The Master Lock No. 3SSTRIHC stainless steel padlock features a 1-9/16 In. (40mm) laminated steel body design, with a tough weather coated finish for maximum strength and reliability. The 9/32 In. (7 mm) diameter shackle is 3/4 In. (19 mm) long and made of stainless steel, offering extra 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 can trust.