The Master Lock 5SSKAD Stainless Steel Padlock with Key features a 2 in. (51 mm) wide laminated stainless steel body for maximum strength, reliability, and weather resistance. The 3/8 in. (10 mm) diameter shackle is 1 in. (25 mm) long and made of stainless steel, offering maximum resistance to cutting, sawing and weather. 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 know and can trust.