This Sliding Window Sash Lock by Slide-Co is constructed of diecast materials and comes in a corrosion-resistant black-painted finish. The mounting holes are spaced evenly apart and measure 2-1/4 in. from center to center with a 3/8 in. latch projection. This style of sash lock does not use a separate keeper because the latch engages directly into the fixed rail of the stationary sash to lock the window. Used on vertical and horizontal sliding windows.