For bedroom or bathroom doors. Both knobs lock or unlock by turnbutton inside, or emergency key outside. 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" to 2-3/4" square corner, radius corner, or drive-inapplications; includes both square and 1/4" radius corner strikes.