This is a Schlage Style Cylinder with a Russwin D1 keyway designed to fit most key-in-knob and key-in-lever cylinders and some deadbolts.  The lock is 0-bitted 6 pin cylinder with all Number 0 bottom pins and 2 uncut Russwin Look-Alike keys and six tailpieces. Easily repin the lock and duplicate the keys to match to an existing cut key.   Uses A1011D1 RU46 6 pin key. Satin Chrome finish.