Master Lock Model 3BLU Steel PadLock No. 3 reinforced laminated Steel Safety PadLockwith blue bumper. Ideal when Lock may be subjected to physical abuse. 1-9/16in (40mm) wide Lockbody. 9/32in (7mm) diameter shackle with 3/4in (19mm) high clearance. Keyed different 4-pin tumbler cylinder.