Master Lock Padlock -1 1/8'' wide. 4 pin tumbler security. Tough, laminated, cadmium rustproofed steel case, nickel plated shackle, 3/16'' diameter. Shackle clearance: Vertical 9/16'' horizontal 1/2''. Removable key change number for added security. Patented guard plates to resist attempts at rapping and picking to open locking lever. Master 7KALaminated Steel Padlock4 Pin CylinderDual Locking Levers