Carefully selected materials. Locks for sliding doors and windows are made of a combination of metal and rubber, which has certain impact resistance and durability, and can be reused. Adjustable design. Locks on sliding doors and windows allow the thickness range to be adjusted from 4cm to 2.5cm using the window stop button. Make sure the windows are always open. Window locks are used for indoor air circulation to prevent others from closing windows by mistake. Make sure the windows are tightly closed. The window lock prevents windows from being forced open from the outside, ensuring the safety of the child's life. Specifications 6*3.5*3cm