Kwikset 91560-004 Milan Round Keyed Entry Lever Featuring SmartKey in Satin Nickel For use on exterior doors where keyed entry and security is needed Featuring smartkey re-key technology; re-key the lock yourself in seconds in 3 easy steps Ansi/bhma Grade 2 certified Fully reversible lever, can be installed on both right handed and left handed doors Locking mechanism functions by pressing the push button on the interior of the lock