The Master Lock No. 15SSTLJ Stainless Steel Padlocks feature a 2-1/2in (64mm) wide laminated stainless steel body for maximum strength, reliability, and weather resistance. The 7/16in (11mm) diameter shackle is 2-1/2in (64mm) long and made of stainless steel, offering maximum resistance to cutting, sawing, and weather. The 5-pin brass cylinder prevents picking and the dual locking levers provide resistance against prying and hammering. The Lifetime Guarantee provides peace of mind from a brand you can trust.