The Master Lock No. 311SSKADLH Stainless Steel Padlock features a 1-9/16in (40mm) laminated steel body design, with a tough weather coated finish for maximum strength and reliability. The 9/32in (7mm) diameter shackle is 2in (51mm) long and made of stainless steel, offering extra resistance to cutting, sawing, and weather. A black weather resistant thermoplastic shell is designed to add protection against moisture, dirt and grime. The 4-pin cylinder prevents picking and the dual locking ball bearings provide resistance against prying and hammering. The Lifetime Guarantee provides peace of mind from a brand you can trust.