For hall and closet doors, all interior doors where a simple latch is all that is required. Both knobs always free; no locking mechanism. All metal components. Solid steel latch assembly. Seamless one-piece knob for extra strength. Easy installation. Square spindle for right or left handed installations. 6-way adjustable latch fits 2-3/8 in to 2-3/4 in square corner, radius corner, or drive-in applications; includes both square and 1/4 in radius corner strikes.