10 Best Window Locks of August 2025

• Secondary Lock
• Fits up to 1/8 In. thick rails
• Allows window to lock in ventilating position
• Easy to Install

Defender Security

Momentum Brands

• EACH PACK INCLUDES – (1) Adjustable jaw that fits all vinyl frame rail thicknesses from 1/16" up to 1/2 in. thick. "Vise like" grip holds securely and will not mar frame. Allows window to lock in ventilating position; cam style locking lever; no tools required. This is for Vinyl Windows only.
• SECURELY LOCK WINDOWS – These U 9809 sliding window locks for vinyl windows help keep them securely closed. The locks feature an adjustable jaw that has a “vise-like” grip, and they are capable of opening up to ½” wide.
• 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.
• 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.
• 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”.

Defender Security

• 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.
• NEW NAME - SAME GREAT BRAND YOU TRUST: Toddleroo by North States not only makes the baby gates and yards that you love, 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, ease of use, and functionality. Easy to install, and safety you and your family can count on.
• SIMPLE YET EFFECTIVE:The Window & Door Wedge Locks feature an easy hook and loop installation, with no tools, no screws, no nails, no damage to your windows or sliding doors. The soft white color stylishly blends in with any home decor.
• MAKE YOUR HOME SAFE: Babies like to explore all those nooks and crannies’ around the house. With this 4-pack of sliding window and door wedge locks, you can help to keep your little one out of harm’s way.

Toddleroo by North States

• Adjustable between 10.6" to 16.625" (BK112) and between 15.7" to 26.75"(BK111)
• Visual Deterrent: it's visible through the window and it will discourage potential burglars
• Child-proof: child-safe locking mechanism prevents unwanted opening. Mount at variable heights, including out of reach of children
• Quick and easy installation (either with screws or tape), it's not a pressure-mounted bar, so it won't get loose. Please watch the installation video before purchase to ensure it will work in your frame
• Perfect for window installations: Install in-window air conditioners or pet door while locking your window or door in place

Ideal Security

• MOM AND DADS AGREE SAFETY IS FIRST: We know you put your baby's safety at the top of your list. That's why you'll appreciate our Safety Innovations Window and Door Safety Stop. This helpful device keeps windows, sliding glass doors, sliding shower doors and mirrored sliding closet doors locked to keep your baby safe.
• YOUR BABY'S SAFETY IS OUR #1 PRIORITY TOO: We know how curious kids are! Our goal is to help all moms and dads keep their kids safe. Our Window and Door Safety Stop keeps windows and sliding glass doors locked to prevent window falls and to keep your children from wandering into unsafe areas.
• EASY TO USE: Simple sliding motion locks and releases.
• EASY TO INSTALL-NO SCREWS, NO DRILLING, NO MESSY ADD-ON ADHESIVES: Comes with pre-applied, heavy-duty industrial strength 3M VHB tape. Just peel the paper off backing and attach to your window or glass door. No mechanical skills required!
• FOR ADDED SAFETY WE RECOMMEND USING 2 LOCKS ON EACH WINDOW OR DOOR: Keep you windows and sliding glass doors locked so your baby is safe and secure.

Safety Innovations

• Cam-type sash lock
• Used on many double-hung windows
• 1 latch assembly 1 keeper and screws
• 2 in. hole spacing
• White finish

PRIME-LINE

• Latch has cam action hook which draws keeper tight when locked
• Latch body has anti-jimmy studs which engage keeper
• Very popular latch for single and double hung vinyl window
• Country of Origin: China

PRIME-LINE

• WINDOW SASH LOCK – This window sash lock can be used on vertical single and double hung sliding windows, and on horizontal sliding windows. It can be installed on windows constructed of aluminum, wood and vinyl sash and frames.
• CHILD-PROOF– Prime-Line Keyed Sash Lock is designed to child-proof sliding windows and secure windows at high elevation. The lock can only be opened with the included key, keeping curious kids safely inside.
• EASY INSTALLATION – Installation is easy with all screws included. The sash lock features a 1” deep base, 5/8” deep keeper with 2” mounting hole center spacing on both the keeper and cam-action keyed locking latch.
• DURABLE – Made of heavy-duty diecast zinc with a white enamel finish, this child-proof sash lock is strong, durable and made to last.
• NON-TURNING KEY - When the key is inserted into the keyhole, the thumbturn and cam are released allowing it to be rotated open or rotated closed. To lock the device in the open or closed position, simply remove the key from the lock.
• NOTE: these are not all keyed alike – each lot contains a limited mix of key numbers

Defender Security

• These slider locks will fit along a track that is up to 3/16 inches wide. They will also fit without the rubber on a track that is up to 3/8 inches wide
• These slider locks are perfect for patio doors, sliding glass doors, sliding windows etc
• Heavy-duty aluminum construction, Inner vinyl lining prevents scratching damage
• Additional gripping power securely locks window in closed or ventilating position
• Easy installation with no tools required. Utilizes double thumbscrews to mount on window or sliding door track

Lion Locks