6-Pin Corbin 77 Keyway Cylinder KD, Satin Chrome Finish, Cylinder is pinned 5, but drilled 6. Fits Arrow D, E, F, K, Schlage B100, B200, B400, H Series deadlock, Operates most Grade 1 & 2 knob cylinder locksets and leversets, CL3900 Corbin Lever and Falco