This is a Schlage Style Cylinder with a NA Composite keyway designed to fit most key-in-knob and key-in-lever cylinders and some deadbolts.  The lock is keyed different and sold with 2 cut National Look-Alike keys and six tailpieces. Satin Chrome Finish. 15995NA-26D-KD.  Composite keyways can be rekeyed as Weiser, Kwikset, Weslock, Segal, and Arrow locks.  Includes: 2 Ilco® look alike keys, 3 rigid tailpieces, 1 lazy tailpiece for single deadbolt, 2 different length lazy tailpieces for double deadbolts.