Master Lock U-Lock 8170D

The Master Lock No. 8170D U-Lock features a 6-1/8 inch (15cm) wide hardened steel body for maximum strength and reliability. The 1/2 inch (13 mm) diameter double locking shackle is 8 inch (20cm) long and made of hardened steel, offering extra resistance to prying, cutting and sawing. The disc key cylinder prevents picking.