For residential single and multi-family bed/bathroom doors. Pushbutton locking, opens from outside with small tool; turning inside lever releases pushbutton. Zinc based and plated, solid lever designing. 3 piece assembly. Triple Option Universal fits alldoors; 2-3/4 in or 2-3/8 in backset; square corner, round corner, or drive-in preps. All locksets have the same finish for both interior and exterior parts except the Bright Brass finish which has bright brass finish on all interior parts and Ultima LifetimeAnti-Tarnish finish on all exterior parts.