1599 Cylinder with Schlage C-K keyway, and 2 cut keys. 26D Satin Chrome Finish. Lock is pinned for 5 chambers, but drilled for 6.  C-K is a less restrictive composite keyway that accepts keys C, E, F, G, K keys as well as higher level keys.  Includes: 2 Ilco® look alike keys, 3 rigid tailpieces, 1 lazy tailpiece for single deadbolt, 2 different length lazy tailpieces for double deadbolts.