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Master Lock U-Lock$18.99
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.