Master Lock 3KALFRED Safety Lockout Keyed-Alike Padlock 1-9/16-inch Body with 1-1/2-inch Extra Length Shackle, Red Bumper Hardened steel shackle for extra resistance Ideal when locks may be subjected to physical abuse 1-9/16-inch (4cm) wide lock body with 1-1/2-inch (3.8cm) high clearance No. 3 reinforced laminated steel padlock with red bumper Proprietary rust proofing for longer life