Top 10 Best security bars for inside windows in 2026

Last Updated - 6/9/2026

🏆Best Choice

ZRFCXE

ZRFCXE Window Locks,4 Pack Sliding Window Locks with Key for Vertical & Horizontal Sliding Windows Doors,Easv to Install,Adjustable Security Window Lock for Patio Bedroom Home and Office (Black)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•【MEASURE YOUR WINDOWS TRACK】: The window lock is apply for sliding windows, sliding doors and vertical windows.please measure your window track size height must be greater than 0.48inch (1.22cm) and width must be less than 0.61inch (1.55cm) before ordering window locks. window locks is equipped with a vertical key, which can be applied to the middle track of the window.
•【UPGRADE PROTECTION DESIGN】: Upgrade protection design,our each window lock has two fixing holes,secure it on the window track,which greatly enhance the holding power of the lock,use double hole locks on heavy windows/doors for added security. window locks are also equipped with protection pads to prevent scratches or damage to your window and improve stability.
•【WIDE USAGE】: It ensures your family members safety,can control the window partially open or closed,effectively reduce the risk of children and pets falling from high windows,by locking your windows, it can also protect your property against damage during heavy rains and hurricanes.This sliding window lock for home,bedroom, kindergarten, office,etc.
•【EASY TO INSTALL】: No additional installation tools or drilling required,3-step quick installation.step1,place the lock to a suitable position.Step2,Insert gasket protect window track from scratches.Step3,tighten the screws,done!you can easily fix the window lock at any part with the vertical key or hex keys,easy to reuse and re-install.
•【PACKAGE INCLUDES】: 4 Sets of window locks for sliding windows,including 4 PCS sliding window locks,4 PCS hex keys,4 PCS gaskets,1 PCS vertical key.Great thanks for choosing us and we care about the customer's purchase satisfaction.If you have any questions while using,just feel free to contact us,we will reply to you within 24 hours and surely offer you a satisfied solution.

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$9.98

$12.99

-23%

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DIIG

DIIG Sliding Door Security Bar，17.7-50.5inch Adjustable Locking Window Safety Bar with Rubber Tips,Diameter 1inch Window Security Bar for Home Apartment Travel (White)

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Sturdy: The sliding glass door security bar is made of 1" diameter white painted metal, which is stronger and more durable than 3/5" window safety bars, less prone to damage and long-lasting.
•A Variety of Adjustable: The patio door security bar with a total length of 50inch can be freely stretched and adjusted between 17.7-50.5inch to perfectly adapt to various lengths.
•Non-slip end design: The sliding door stop is designed with a rubber tip to increase friction and fix it with double nuts to adjust the tension, not easy to fall off, no drilling required, easy to install, and will not damage the door frame. You can use it with confidence
•Easy to Install: Our top window pole can be easily installed in only 3 steps. After selecting the approximate size of the pole, adjust the spring clip to the appropriate size, and fine tune the size of the double nuts on the anti slip base. You can easily install it in place in 1 to 2 minutes!
•Widely Used: This sliding door security bar can be used as both a sliding door lock and a window safety bar, ensuring the safety of pets and family. When you travel or go on a business trip, you can carry or leave it at home. Protecting your home or hotel will make you feel safer.
•Premium Service: If you have any questions about our door and window posts, our customer service experts are available 24/7 to assist you and respond within 12 hours. We are always online to safeguard your safety

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$19.97

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CRODOER

Sliding Window Locks,Window Locks for Horizontal Sliding Windows,Window Security Lock with Key,Adjustable Aluminum Easv to Install Window Stopper,Window Locks for Up and Down Windows (4 Sets Silver)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•【MEASURE YOUR WINDOWS TRACK】The window lock is apply for sliding windows, sliding doors and vertical windows.please measure your window track size height must be greater than 0.48inch (1.22cm) and width must be less than 0.61inch (1.55cm) before ordering window locks. window locks is equipped with a vertical key, which can be applied to the middle track of the window.
•【2024 ENHANCED SECURITY DESIGN】1, window lock and key separation design, to prevent children or thieves to unlock at will; 2, thickened aluminum alloy material, permanent durability and not deformed; 3, window lock two fixed hole design, so that you can experience a stronger security protection; 4, the lock body widening design, open the window when the blocking area is more solid; 5, the window lock is equipped with a protective washer, to prevent scratches or damage to the window.
•【EASY TO INSTALL】 Our window lock offer two mounting options for different widths of window track.Each set of window locks comes with a hex wrench and a vertical wrench. Both methods are easy to install.No additional installation tools or drilling required,3-step quick installation.step1,place the lock to a suitable position.Step2,Insert gasket protect window track from scratches.Step3,tighten the screws,done!you can easily fix the window lock at any part with the vertical key or hex keys,easy to reuse and re-install.
•【VERSATILE USABILITY】The window lock is adjustable in width, making them suitable for most sliding window and doors. The window locks are versatile enough to be used on most types of sliding window and doors, including living room window, sliding glass window, patio sliding doors, and more. They are small and lightweight, making them perfect for travel. You can take them with you to hotels or rental properties to enhance the safety of your temporary accommodations.
•【What's You Get】4 security window locks, 4 mounting hex keys, 4 protective gaskets, 1 vertical key for mounting to center track.Great thanks for choosing us and we care about the customer's purchase satisfaction.If you have any questions while using,just feel free to contact us,we will reply to you within 24 hours and surely offer you a satisfied solution.

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$8.99

$11.99

-25%

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STERGDE

Sliding Window Locks (6 Sets), Security Window Locks with Keys, Adjustable Aluminum Sliding Window Stops, Easy Installation Without Drilling, for Vertical and Horizontal Sliding Windows (Silver)

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•MEASURE YOUR WINDOW TRACK BEFORE BUYING: Our window locks are designed to fit a wide range of vertical and horizontal sliding door windows, please measure your window track for compatibility with the locks before buying, With a track size height requirement of greater than 0.48 inch (1.2 cm) and width limitation of less than 0.61 inch (1.55 cm). Depending on the type of track, window locks can be installed on either the inside track or the center track.
•ENHANCED SECURITY DESIGN: 1, window lock and key separation design, to prevent children or thieves to unlock at will; 2, thickened aluminum alloy material, permanent durability and not deformed; 3, window lock two fixed hole design, so that you can experience a stronger security protection; 4, the lock body widening design, open the window when the blocking area is more solid; 5, the window lock is equipped with a protective washer, to prevent scratches or damage to the window.
•VERSATILE USABILITY: Our sliding window security locks are widely used in a variety of situations, including homes, apartments, hotels, offices and more. The window lock can freely control the sliding window to partially open or completely close, preventing children or pets from accidents, preventing burglars and thieves from trespassing, the security window locks can provide you with more safety protection.
•EASY TO INSTALL WITHOUT DRILLING: No additional tools or drilling required for installation. Place the lock in place, insert the protective spacer and tighten the screw to secure. You can use the vertical key or hexagonal key to reinstall the lock in different positions, the window lock is easy and convenient to reuse.
•PACKAGE INCLUDES: 6 security window locks, 6 mounting hex keys, 6 protective gaskets, 1 vertical key for mounting to center track. If you have any issue about the window locks, please contact us. We will reply within 24 hours.

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$15.85

$24.39

-35%

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PENMAMA

Window Locks, 4 Sets Sliding Security Window Lock with Key for Vertical & Horizontal Sliding Windows & Sliding Doors, Adjustable Window Locks Security Window Stoppers for Patio Bedroom Home and Office

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•【Compatibility】 Window locks are applicable for sliding windows, sliding doors and vertical doors. Locks are 2.4 inches long and fit tracks up to 0.4 inches wide inches with rubber cushioning or up to 0.67 inches without rubber cushioning. Please measure your track to ensure proper fitment.
•【Screw In Design】 Sliding window locks utilizes double screws to mount on sliding window/door tracks, prevent sliding and add more security. Simply screw them with hex keys (included) for fully secure windows/doors or to allow for ventilation, no extra tools needed. Comes with rubber cushioning to prevent scratches or damage to the window and improve window security.
•【Quality Aluminum Alloy】 Sliding door and sliding window stoppers: The strong aluminium will remain secure which is sturdy and strong, and the cute yellow key handle is showy and easy to be found.
•【Widely Use】Slider window locks are perfect for sliding patio doors, sliding glass doors, etc. Feel free to open the windows a few inches to get both fresh air and peace of mind, because they no longer open enough for someone to slip into your house without breaking the window and alerting your dogs. Put some window lock latch to your kid's room to keep your toddler from falling out the windows.
•【Package Includes】 Pack of 4 sliding window locks with rubber cushioning and keys; Apply multiple window locks can increase sliding door/window security.

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$12.89

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ARTOSHIN

1Pack Window Security Bar Adjustable Sliding Lock Security Stick for Rubber Tips, Adjustable Sliding Glass Door Lock Bars 15.7''-27.5'' Tension Rods 1.2'' Diameter Window Safety Lock Bar

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•【Window Security Bar】Package contains 1 pieces adjustable window bars security inside that can securely lock the sliding door in place to improve window security bars, and sufficient quantity to fully meet your daily needs.
•【HIGH QUALITY MATERIAL】This window sliding door security bars for inside windows adopts electrostatic spraying technology to avoid rust and feels smooth. No burrs, no peculiar smell and no harm to your health, you can use it with confidence.
•【EASY TO INSTALL】Our window security bars is very easy to install, with only a few simple steps needed to complete it. The security bars for windows is about 40-70 cm/15.7-27.5 inches. When the bar is unscrewed, the built-in spring provides enough tension to act as a hold.
•【Adjustable Design】The window security bars can be easily adjusted to the ideal width to effectively prevent intruders from entering and also protect children from being hurt when opening the door due to curiosity.
•【WIDE APPLICATION】This adjustable security bar can be used not only for windows and sliding doors, but for other areas of the home as well. Such as clothes hangers, shoe racks, bookcase pull rods, cabinet pull rods, storage room pull rods, hanging curtains, door curtains, etc., also can be used for hanging light strips, Christmas decorations, Halloween decorations, etc. Can meet your various needs.

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$9.98

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DEROFIT

Sliding Door Security Bar,2Pcs 16 to 51 Inch Inside Sliding Patio Door Window Security Bar Stopper, Adjustable Window Locks Security Bars for Home Apartment Security, Sliding Glass Door Lock Hardware

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•16" to 51" Adjustable: Sliding door security bar consisted of telescoping and splicing extension rod allows for maximum adaptability to fit most average and huge window or sliding doors, provides an additional layer of protection, preventing forced entry and keeping your home safe and secure
•2 in 1 Security Bar: The bottom of the lock bar can be easily removed, you can use this window safety bar as sliding door security bar for sliding glass door and windows, also as window security bars for large patio doors or sliding doors
•2Pack Child Proof Safety Bar: Sliding door security bar can provide a visual and physical deterrent to intruders and reduce the risk of burglary. They can also prevent children and pets from falling out of windows. Ideal for homes with children or pets, this bar prevents doors from being accidentally opened, adding safety and peace of mind
•Heavy Duty Lock Bar: Constructed of high grade metal, this sliding glass door lock bar is able to withstand 400 pounds of pressure, providing reliable protection for your home,apartement or office. Extra little key adds a lot more security to the bar
•Easy Installation and Portable: There is virtually no installation, just set it in the track. This sliding door security bar is easy to assemble and take apart for storage and fit in your large luggage, can be used not only at home but also in hotel rooms or vacation rentals, ensuring safety wherever you go

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$30.99

$42.99

-28%

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PRIME-LINE

Prime-Line U 9899 Swing Bar Lock for Hinged Swing-In Doors – Secondary Security Lock for Door & Security, 3-7/8” Bar Length, Diecast Zinc Construction w/ Antique Brass Finish (Single Pack)

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•SECURITY LOCK – This swing bar lock is a security locking device for hinged swing-in doors, allowing a door to be slightly opened to allow safe viewing and ventilation
•CHILD-SAFE SECURITY DEVICE – This swing bar door lock can also be installed out of reach of children so they cannot open the door by themselves, providing additional child-safe door security
•EASY INSTALLATION - Adding a security swing latch to your door is quick and easy; all installation fasteners, including plastic shim spacers for leveling, are included
•STRONG AND DURABLE – Constructed of zinc diecast with an antique brass finish, the security door lock is strong, durable, and sure to last
•DIMENSIONS - This locking bar is 3-7/8 inch bar length x 2-1/2 inch height and has a long, hinged bar, which folds over the closed door to engage the catch; for further dimensional information, please see the line drawing

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$7.04

$7.82

-10%

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Droutti

8 Pack Window Security Bar Window Lock Bar 15.7-27.6 Inch 1/2'' Diameter Adjustable Sliding Glass Door Lock Window Safety Bars with Rubber Tips Sliding Door Security Stick for Bathroom Cupboard

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Package Contents: You will get 8 pieces of window safety bars in white, which can firmly lock sliding doors in place to provide you with extra protection at home, and adequate quantity can fully meet your daily needs, easy to replace and share.
•Product Size: The sliding door security bar diameter is 1.3 cm/ 0.51 inch, the non-slip rubber head diameter is 2 cm/0.79 inch, and spring tension rods can be adjustable from 15.7 inches (40cm) - 27.6 inches (70cm) to fit most standard doors.
•Fixable and Non-Slip: This tension rod is a built-in spring, just twist and pull this spring rod without any tools, can be fixed on the window frame or door frame and anti-skid rubber at both ends enhances friction, not easy to fall off and without damaging the walls/doors/windows, easy to install.
•High-Quality Material: The security rods for windows are mainly made of quality stainless steel material and plastic, adopting electrostatic spraying of steel surfaces, window safety bars can effectively avoid rust, are strong and sturdy, and not easy to fade or break, with a smooth surface, serving you for a long time.
•Wide Range Of Applications: This slide security bar can be applied as a sliding door lock to keep the safety of the home, and it can also be used as a window security bar, refrigerator bar, closet rod, cupboard rod, shoe rack, bookcase pull rod, cabinet pull rod, pantry pull rod, bathroom curtain pull rod, which can meet your various needs.

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$21.93

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VONVOFF

VONVOFF Flip Latch Lock,Heavy Duty Stainless Steel Bar Latch,Safety Door Bolt Latch Lock for Home Window Door Cabinet Furniture Pet Gate.2 Packs,Silver

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•High quality : these Flip Latch Gate Latches are made of high quality solid stainless steel,strong toughness,strong and rust proof., which will be harder,durable and non-fading for longevity.
•Easy to Use:Easy to install on the gate with screws,Just use the provided screws to fix it,practical and security.
•Additional Security: The security door latch provides additional security to keep your home safe and private.
•Wide range of applications:Perfect for garden door,toilet door,pet door, cabinets door,barn latches, wooden fence latches, outdoor door latches, bathrooms, doors,kitchens, offices, hotels and Windows, etc
•Specification:2Pack Stainless Steel Gate Latches ,with 8 pieces screws.

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$8.59

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