Top 9 Window Locks for Horizontal Sliding Windows – Window Locks & Latches

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1. Defender Security

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Defender Security U 9809 Sliding Window Lock for Vinyl Windows – Easy Installation to Keep Windows Securely Closed – White Diecast Construction Pack of 2

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Defender Security #ad - Each pack includes – 2 adjustable jaw that fits all vinyl frame rail thicknesses from 1/16" up to 1/2 in. For use on most vinyl windows – these sliding window locks are for use on horizontal sliding windows and most vertical sliding single hung windows as a secondary window lock.

Note: not intended for a patio door, windows only. Product info – these sliding window locks have a diecast construction with a white painted finish and can fit most vinyl frame rail thicknesses ranging from 1/16” to ½”. Thick. This is for Vinyl Windows only. Add extra security – use these sliding window locks to prevent unwanted intruders and avoid falling accidents –keeping your windows closed when you want them the most secure! Air and a breeze can get in, but no intruders. Vise like" grip holds securely and will not mar frame.

Allows window to lock in ventilating position; cam style locking lever; no tools required. When installing this lock, the cam style locking lever should be rotated hand-tight over the rail or vinyl edge to a sufficient torque prior to locking down the lever. The locks feature an adjustable jaw that has a “vise-like” grip, and they are capable of opening up to ½” wide. Securely lock windows – these u 9809 sliding window locks for vinyl windows help keep them securely closed.
BrandDefender Security #ad
ManufacturerPrime-Line Products (Home Improvement) #ad
Height5.44 Inches
Length1.18 Inches
Width1 Inches
Part NumberU 9809
ModelU 9809
WarrantyGoods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse.

2. Shop Square

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Requires 28-36mm Clearance for Screw Lock, Door Stopper Safety Lock, Adjustable Aluminum Security Screw Lock for 3/16-3/8” Track, Lion Locks Sliding Window and Door Locks 10 Pack, No-Drill Install

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Shop Square #ad - The vinyl insert provides additional gripping power when locking your windows down. Durable & sensible: made of heavy-duty aluminum the lock includes a vinyl lining to prevent you from scratching your window frame.

No tools needed: these window locks are easy to install with double door lock thumb screws securing sliding door & window tracks up to 3/16" wide with the rubber insert or 3/8" without the rubber window seal. Ideal for securing a vertical window air conditioner or window fan setup. Sliding track lock: secure your patio door, sliding glass door, and both horizontal & Vertical sliding windows.

Window locks security: whether you are looking for a way to lock in an AC unit window setup, as a camper lock replacement, or as part of your babyproofing house setup. Child proof door lock: use this window lock to protect your family from intruders and more! The sliding door lock allows you to leave sliding windows & doors securely locked in position, whether fully closed or ajar to allow a breeze.
BrandShop Square #ad
ManufacturerShop Square #ad
Weight0.66 Pounds
Part NumberLLTR10
ModelLLTR10

3. Defender Security

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Defender Security U 9819 Sliding Window Security Lock, Economy, Silver, Aluminum,Pack of 4

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Defender Security #ad - Easy to Install. Finish by tightening thumbscrew with pliers to securely lock windows in closed or ventilating positions. For non-marring locks see no's u-9820, u-11128, U-10876 and U-10551. For heavier-duty locks see item no's u-9800, u-9802, u-11127, u-9821, u-9810 or u-9812. Thick rails. Secondary Lock. For vinyl windows use U-9809 or U-10547. Fits up to 1/8 In. Allows window to lock in ventilating position.
BrandDefender Security #ad
ManufacturerPrime-Line Products (Home Improvement) #ad
Height0.43 Inches
Length0.88 Inches
Weight0.14 Pounds
Width1 Inches
Part NumberU 9819
ModelU 9819
WarrantyGoods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse.

4. Toddleroo by North States

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Toddleroo by North States Sliding Window & Door Wedge Locks | Limits The Space That Windows and Sliding Doors can Open | No Tools Required | Baby proofing with Confidence 4-Pack, White

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Toddleroo by North States #ad - Simple yet effective:the window & door wedge locks feature an easy hook and loop installation, no nails, with no tools, no screws, no damage to your windows or sliding doors. With this 4-pack of sliding window and door wedge locks, you can help to keep your little one out of harm’s way.

Make your home safe: babies like to explore all those nooks and crannies’ around the house. Window & door wedge locks 4-pack: the perfect solution to prevent your curious little one from sliding windows and doors open. They work in multiple places, including double hung and horizontal sliding windows and doors, by limiting the height the window or door can open. The soft white color stylishly blends in with any home decor.

Easy to install, and safety you and your family can count on. New name - same great brand you trust: toddleroo by north states not only makes the baby gates and yards that you love, ease of use, but we now have a full line of babyproofing products to keep baby safe anywhere in your home! Safety & convenience: our new childproofing line was thoughtfully designed to maximize safety, and functionality.
BrandToddleroo by North States #ad
ManufacturerAmazonUs/NOFT9 #ad
Height7.75 Inches
Length4.5 Inches
Weight0.18 Pounds
Width0.85 Inches
Part Number6156
Model6156

5. OYU

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Window Security Safety Locks with Key, OYU Window Locks, Double Window Locks for Sliding Windows Adjustable Window Stopper for Home and Office, 4 Pack Aluminum Alloy Sliding Door Lock for Kids & Pets

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OYU #ad - Note: heavy doors and windows should be fixed with multiple locks to improve stability and safety. The upgraded double lock design is more secure and suitable for heavy doors and windows. 2. 36 x 094 x 094 inch, guard against theft. What you get4 sets of window locks for sliding windows, including 4 sliding window locks with keys, 4 rubber pads and 1 vertical key, 4 gaskets, can fully meet big family and large house requirement.

The key can be removed and stored properly to prevent children from opening by mistake and eliminate all potential hidden dangers. Easy to reuse and re-install. Upgrade protection designthis window lock is made of solid aluminum alloy, anti-rust and anti-aging. Easy to installthis adjustable lock for home is suitable for both windows and sliding doors.

No additional installation tools are needed. Double protectioneach sliding window lock is equipped with a protective gasket and a rubber pad, the window lock will not fall, double protection to prevent scratches or damage to the window. All you need to do is to spin the key through the hole and fix the window stopper on the track. You can easily fix the window lock at any part with the vertical key. Keep your house safe, apply to track with more than 0
BrandOYU #ad
ManufacturerOYU #ad
Height2.76 Inches
Length4.53 Inches
Width3.15 Inches
Part NumberWindow Locks-4 Pack

6. PRIME-LINE

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Diecast Construction, Used on Vertical & Horizontal Sliding Windows, PRIME-LINE F 2588 Sash Lock, White

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PRIME-LINE #ad - Mounting hole centers. This item has 2-1/16 in. Baked-on white enamel finish. Diecast construction. This sash lock can be used on horizontal and vertical sliding windows constructed of aluminum, wood and vinyl materials.
BrandPRIME-LINE #ad
ManufacturerPrime-Line Products #ad
Height0.87 Inches
Length1.12 Inches
Weight0.18 Pounds
Width2.6 Inches
Part NumberF 2588
ModelF 2588
WarrantyGoods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse.

7. OYU

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Aluminum Window Security Safety Locks for Kids & Pets, Window Locks for Sliding Windows Window Stopper for Home and Office, OYU Window Locks, 8 Pack Adjustable Sliding Door Lock with Key

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OYU #ad - Window locks securitysize approx. Effectively reduce the risk of children & pets falling from heights, guard against theft. Easy to installthis adjustable lock for home is suitable for both windows and sliding doors.

What you get8 sets of window locks for sliding windows, including 8 sliding window locks stopper, 8 keys, 8 gaskets and 1 vertical key, can fully meet big family and large house requirement. This locks for windows with protective gasket can provides enough friction between the lock and the track to ensure that the window will not slide open. No hole installation saves time and effort. All you need to do is to spin the key through the hole and fix the window stopper on the track.

No additional installation tools are needed. The upgraded vertical window locks design allows the key to be removed and stored properly to prevent toddlers from opening it by mistake. Upgrade protection designthis window lock is made of solid aluminum alloy, anti-rust and anti-aging. Easy to reuse and re-install. 1. 18 x 094 x 0
BrandOYU #ad
ManufacturerOYU #ad
Height2.76 Inches
Length4.53 Inches
Width3.15 Inches
Part NumberWindow Locks-8 pack

8. The Lock-It Block-It

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Door Jammer & Sliding Glass Door Security bar, Lock-it Block-it – 2 Devices Home Security Adjustable Window Locks/Window Security Bars, Child Safety Lock & Patio Door Security bar

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The Lock-It Block-It #ad - Blocks children from falling out of open windows. Window tracks MUST be at least 1 inch wide. Used for single-hung windows, Sliding Windows and Patio Doors. Important - before buying, measure the window or door track where the device will be placed.

Withstands repeated impacts with its unique double-headed push pin that provides extra resistance from forced entry. The security bar extends from 17 inches to 30 inches long MAX length is 2 and 1/2 feet. Lock the height in place with the push of a pin. No tools needed. Removes easily in emergencies. It doesn't fall out when the window is lowered. Device is 1 inch by 1 inch wide on all sides.

Burglars can't reach it from the outside when properly installed and adjusted. When the window makes contact with the Lock-it Block-it, it's Stopped. Quick & easy installation. Replaces those ugly wood blocks. Extendable & adjustable! control how high you want the window to open with the 13 adjustable settings. Fits discretely in window track and doesn't obstruct view.
BrandThe Lock-It Block-It #ad
ManufacturerThe Lock-It Block-It #ad
Height1 Inches
Length17 Inches
Weight0.5 Pounds
Width1 Inches
Part Number57104
ModelLB-005

9. Securityman

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Adjustable Window Lock Bar Child Proof/Heavy Duty Iron, Securityman Window Security Bar, Extendable 14.25" to 37" Security Bars for Windows, Easy Install for Horizontal/Vertical Windows, White

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Securityman #ad - 2 install directly in window rail without drilled mounting brackets. 2 easy install methods: our window security lock comes with everything needed for an easy install. Constructed with high grade iron. Our window stopper allows you to keep you windows open while keeping intruders out even in a fixed position.

Child proof anti-lift lock: the sliding window security bar features a anti-lift child lock that offers you peace of mind knowing your child cannot disable the security bar. There are 2 install methods. It can be extended between 14. 25" to 37" and be installed and removed in seconds. 1 drilled mounting bracket install for extra security.

For vertical and horizontal windows: the sliding window lock can be easily installed in virtually any window in your home. A visual and physical deterrent: keep your family safe with a window bar that is built to withstand 250lbs of force and serve as a highly visual burglar deterrent. Keep your windows open but secure: enjoy open air circulation with added security.
BrandSecurityman #ad
ManufacturerSECURITYMAN #ad
Part NumberSECURITYBARWS