Width controllable: Freely control the window width to prevent children or pets from climbing out of the window.Suitable for families, hotels, schools, kindergartens, No Punching: Each lock is equipped for key, turn the for key slowly through the hole, only need to control with the for key, no additional installation tools are required. it is sturdy and Must-Have Items: Secure for prevent children from falling, Colour:Photo Color Material:Metal Size: . 66x35x31mm/2.60x1.38x1.22inch Package Contents: 2 x Adjustable Window Security Locks 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.