Kwikset #97300-949 latch has adjustable backset 2-3/8" to 2-3/4" to fit all standard door preparations. Locking mechanism functions by pressing the push button on the interior of the lock. Fully reversible lever, can be installed on both right handed and left handed doors. Easily installs in minutes with just a screwdriver. Lifetime mechanical and finish warranty. Microban Antimicrobial product protection keeps door hardware 99.9% cleaner than unprotected surfaces.