6250", Stainless, OD 1 5/16" Ruland clamp style shaft collars do not mar the shaft, are infinitely adjustable, and have superior holding power when compared to set screw collars.
There are no keys or cards to manage, no computers to program, no batteries to replace, and combinations can be changed in seconds without removing the lock from the door. Simplex mechanical pushbutton locks offer a convenient way to control access between public and private areas.