Master Lock Solid Body Padlocks 51mm. The Master Lock No. 150D Solid Body Padlock features a 2in (51mm) wide solid brass lock body that is strong, durable and resists corrosion. The 9/32in (7mm) diameter shackle is 1in (25mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The 5-pin cylinder prevents picking and the dual locking levers provide resistance against prying and hammering. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.