Easy and Quick InstallationFirst determine the installation positions of the window lock and screw holes and drill holes with an electric drill. Then fix the window lock and fixer on the window with a screwdriver and screwsWindow Lock Widely UsedWindow locks can be installed on single or double-hung aluminum, wood, vinyl Windows or doors that slide vertically or horizontally. The spacing of Window sash lock screw holes is 14mm/0.5 in, Please confirm the window type and installation size before purchasingExcellent Product MaterialWindow latch replacement is made of high-quality zinc alloy material, with high hardness, good wear resistance, corrosion prevention, rust prevention, more durable; Window locks & latches surface using enamel finish, clean and tidyInclude and After-sales ServicePackage includes 4 sets of window latch, 16 mounting screws; We provide product warranty or return service, if you receive the product has a problem, please contact us in time, we will give you a satisfactory answerProtect Family and PropertyInstalling window locks & latches will greatly improve the security of your home and prevent children or pets from opening Windows or doors in a dangerous way. Improve anti-theft effect, protect your family and property safety