The Master Lock No. 8285 Heavy Duty U-Lock features a 6in (15cm) wide hardened steel body for maximum strength and reliability. The 1/2in (13mm) diameter double locking shackle is 11in (28cm) long and made of hardened steel, offering extra resistance to prying, cutting, and sawing. Included is a 4ft (1.2m) x 3/8in (10mm) looped-end cable for increased security and a greater application range. The disc key cylinder prevents picking attacks. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.