Master Lock's 311SSKADLF Stainless Steel Padlock features a 1-9/16 inch laminated steel body design, with a tough weather coated finish for maximum strength and reliability. The 9/32 inch diameter shackle is 1-1/2 inches 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 levers provide resistance against prying and hammering.