The Master Lock No. 510D Laminated Padlock features a 1-3/4” (44 mm) wide laminated steel body for strength and reliability. The 9/32” (7 mm) diameter shackle can be adjusted from 5/8” (16 mm) to 2” (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.