These are some window safety locks which use aluminium alloy material for durable and practical use. No need to drill holes, can avoid forced prying of windows from outside, can provide protection for your safety and family safety, easy to install and remove, very convenient, save your time and efforts. Features -Color:Silver -Material:Aluminium alloy -Size:6.00X4.50X2.00cm/2.36X1.77X0.79in -Inner width: 18mm/0.71in -Adjusting distance: 17-62mm/0.67-2.44in - Made of aluminium alloy, these window locks security are lightweight and strong, not easy to break, deform or fade for longtime use. - Aluminium alloy materials made window locks can prevent wear, strong and reliable, and has a longer use. - Metal window safety lock is made with fine workmanship, not easy to deform and convenient in use. - The installation and operation method of this window lock is simple and convenient, saving your time. - Window locks are designed for windows, vertical sliding windows, and sliding doors, sliding glass doors, etc. Package list: 2 Window Locks