Keep your family and children safe: The window security lock can control the window to partially open or close, effectively reducing the risk of children and pets falling from high . The window bars also allows you to keep the window open a small part when you sleep with the air conditioner on, enjoying the air circulation while ensuring and keeping intruders out Easy to use: You just need to put the window blocker security directly across the window rail or door rail after adjusting the length of the window jammer security bar to fix the window or door, tool-free installation and removal. For vertical , you will need to prepare your own Nylon Buckle or screws in order to secure the window locks to the window frame is priceless: The apartment window security is made of high quality metal, more than other plastic or PVC products to withstand the impact, more thick and , not deformed and rusty, indispensable window security guards for families Measure before purchase: Please measure the window or door rail where the window security bars will be placed before you purchase. The window rail must be at least 1 inch wide and 16.5 inches long to accommodate Note: Before purchasing our adjustable window security bar, please confirm your window size to avoid the situation that it cannot be used. This window security bar internal security device is only suitable for small (window frame 9.8-16.7 inches). Colour:White Material:Metal Size:A:9.84inch Package Contents: 1 x Adjustable Window Lock Only 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.