The Master Lock No. 1901D Solid Brass Padlock features a 1-3/16in (30mm) wide solid brass lock body that is strong, durable and resists corrosion. The 3/16in (5mm) diameter shackle is 5/8in (16mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking levers provide resistance against prying and hammering Features: 1-3/16in (30mm) Wide solid brass body padlock Hardened steel shackle for extra cut resistance 4-pin cylinder helps prevent picking