Product Features: [Window Lock Widely Used]Window sash lock full length is 3in, the height is 0.5in, and the spacing of screw holes is 2.1in; Window locks can be installed on single or double-hung aluminum, wood, and vinyl Windows or doors that slide vertically or horizontally [Easy to Install]: These locks require no tools or drilling and can be installed in minutes. [Extra Security]: They provide extra protection from theft and intruders and are an perfect way to add more security to your windows. [Fits Most Windows]: These window sash locks are designed to fit vinyl single or double hung, vertical or horizontal sliding windows. Material: zinc alloy Color: White Package Contents: 4 sets of window latch 16 mounting screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.