This Truth Hardware Casement Window Sash Lock by Prime-Line Products is constructed of diecast zinc and comes in a white-painted finish. It is a right-handed lock and it features a low profile design to remain in-line with the thickness of the window's sidestop trim. The mounting holes are spaced apart at 2-3/8 inches, on center, and it comes complete with its keeper and installation fasteners. When the lever is activated, the locking cam engages the keeper, drawing the window tightly closed against the weather stripping. These locks have a stepped underside and are easy to install.