The American Lock A1207BLK solid aluminum padlock features a 1-3/4 in (44 mm) W aluminum, black body and a 3 in (75 mm) H, 5/16 in (8 mm) Dia hardened boron alloy steel shackle for superior cut resistance. Dual ball bearing locking mechanism resists pulling and prying and 5-pin APTC12 rekeyable cylinder is pick resistant and has tens of thousands of key changes.