This sliding glass door child lock is made of , which can withstand use. Features the aluminum alloy and rubber material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. This sliding glass door child lock will make window fixation easier and smoother. Features - Color: Black -Material:aluminum alloy, rubber - Size: 6.70X4.00X3.00cm/2.63X1.57X1.18in Suitable window/door slide thickness: 0-1.6cm Suitable track thickness: 1mm-16mm (inner clamping)/13mm-28mm(outer supporting) - When the weather is stuffy, it is not to open the window at night for ventilation, and it is and convenient to lock the window with an auxiliary lock for ventilation. - No need for punching holes, no need for installation, just fix it onto the track and rotate the button. - Keep your child from dangers of home, better prevent unwanted accidents, improve security. - Non-slip rubber pad, and stable, can be used directly without drilling installation, metal anti-skid rubber pad, strong durability. - Excellent craft, carefully down to every detail to give it and beautiful look. Package list: 1 x sliding door lock