Upgrade your home security with the sleek and modern Austyle Quadlock by Superior Brass, crafted from durable 304 stainless steel with a matte black finish. This high-security, multi-function lock offers passage, privacy with escape, deadlatch, and deadbolt options for versatile performance. The 30mm backset and 85mm center to center (CTC) measurement ensure easy installation for both traditional and modern doors. Superior Brass is known for its quality hardware. This lock is face-fix for convenient installation and is reversible for left and right hinged doors. Screws are included for a hassle-free experience. Explore our collections of locks and latches and black hardware to complete your project.