●Set Contents: 4 piece set light silver ●Size: Length 2.4 x Width 1.4 x Height 1.6 inches (6 x 3.5 x Installation range: 11.0 - 16.5 inches (28 - 42 ●Material: Die-cast steel + rubber. Durable and scratch resistant ●How to Use: Easy auxiliary lock by simply inserting into the groove of the sash ●Uses: Prevents rain, wind, and water spills from accidentally opening the window on the day when the porch gets indoors. It can prevent tampering by people and pets and prevent crime