Master Lock 1-3/4" Commerical Padlock - Keyed Alike. 1-3/4" wide 4-pin tumbler. Tough, laminated cadmium rustproofed steel case with case-hardened steel shackle. Shackle diameter 5/16". Clearance: Horizontal 3/4", vertical 2-1/2". Dual steel locking levers independently lock each shackle leg for increased protection. Removable key-change number for added security. Comes with 2 brass keys. Masterlock.