Product Description 1-3/4-inch (44mm) Solid Brass Padlock, 2-inch (51mm) Long Shackle, 5/16-inch shackle diameter, keyed different, solid brass body is strong, durable and resists corrosion, dual ball locking for added protection from prying and hammering, hardened steel shackle for added protection from cutting and sawing, 5-pin cylinder for maximum pick resistance. From the Manufacturer 1-3/4" (44mm) Solid Brass Padlock, 2" (51mm) Long Shackle, 5/16" Shackle Diameter, Keyed Different, Solid Brass Body Is Strong, Durable and Resists Corrosion, Dual Ball Locking For Added Protection From Prying and Hammering, Hardened Steel Shackle For Added Protection From Cutting and Sawing, 5-Pin Cylinder For Maximum Pick Resistance.