For residential single and multi-family bed/bathroom doors. Pushbutton locking, open from outside with small tool; turning inside knob releases pushbutton. 1-Piece knob for better security and appearance. Solid brass trim and all metal parts. 3-Piece assembly for easy installation. Fits all doors, 2-3/4 in or 2-3/8 in backset; 1-1/8 in square corner, 1/4 in round corner or circular drive in preps.