Measure your window track before purchase: Our window locks are designed to fit various vertical and horizontal sliding doors and windows. Please measure your window track before purchase to compatibility with the lock and have a track size height 0.48 inches (1.2 centimeters) and a width limit less than 0.59 inches (1.5 centimeters).design: 1. Window lock and key separation design to prevent children or thieves from unlocking at will;2. Thickened aluminum alloy material, permanent durability, without deformation;3. The window is designed with two fixed holes for locking, so that you can experience stronger security protection; 4. Lock the design of the main body and open the window when the blocking area becomes more solid;5. The window lock is equipped with protective washers to prevent scratching or damage to the window.Multi functional availability: Our sliding are widely used in various situations, including houses, apartments, hotels, offices, and more. Window locks can freely control sliding windows to partially open or fully close, preventing accidents for children or pets, and preventing theft and theftEasy to install without drilling: Installation does not require other tools or drilling. Place the lock in place, insert the protective gasket, and tighten the screws to secure it.The software package includes: 4 security window locks, 4 installation hexagonal keys, 4 protective pads, and 1 vertical key for installation to the center trackColour:blackMaterial:MetalPackage Contents:4 x security window locks4 x installation hexagonal keys4 x protective pads1 x vertical keyOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.