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. Triple option universal fits all doors 2-3/4 inch or 2-3/8 inch 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 lifetime.