The Master Lock No. 510D laminated padlock features a 1-3/4 inch (44 mm) wide laminated steel body for strength and reliability. The 9/32 inch (7 mm) diameter shackle can be adjusted from 5/8 inch (16 mm) to 2 inch (51 mm) long for application flexibility, and is made of steel, offering strong resistance to cutting. The warded single locking lever mechanism minimizes jamming from dirt and grime. The limited lifetime warranty provides peace of mind from a brand you can trust.