Our adjustment window locks are made of stainless steel, durable and thick. Can fix the window in place and cannot be pulled or opened, effectively prevent your child from opening the windows by his own, anti-theft and keeping the fresh indoor air. Features - Color: Silver. - Material: Stainless Steel. - Size: About 7.00X3.50X3.20cm/2.75X1.38X1.26in. - These window locks or door locks can add more protection for your family. - It is easy to assemble and operate for windows and offers excellent added security. - Each lock is equipped with key, the key slowly through the hole, just holding on the track by key control. - Only you find the key slot can not be moved by the key at all, the adjustment window lock can effectively lock your windows. - Multiple locks can be applied to heavy window or door together to increase safety. Package list: 2 x Window lock