Feature:1. Simple and beautiful, professional surface treatment, giving people a different feeling.2. Highquality materials, very strong, suitable for most plastic steel alloy window.3. Easy to install, no need to drill holes, no damage to window, easy to open.4. It can improve air circulation, fix screen window, prevent children from falling, and prevent thieves.5. Need to use the key to control the position on the track, no additional installation tools are required.Specification:Item Type: Limit LockMaterial: Stainless SteelWeight: Approx. 141g / 5ozProduct Size: Approx. 6.8x3.6x3cm / 2.7x1.4x1.2inScope of Application: doors and window, etc..Package List:1 x Limit Lock2 x KeyNote:1. Please allow 1‑2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.