15995SX-26D-KD ILCO Key-in-Knob Cylinder with Schlage C-K Keyway
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.