The U-Lock features a 12.7mm hardened steel shackle with a double deadbolt anti-rotation design that resists bolt cutters and twisting leverage attacks. 12.7mm hardened steel shackle resists hand tools, bolt cutters, and leverage attacks Interior locking dimensions: 4 x 9 (10.2cm x 22.9cm). Product weight: 2.9 lbs (1.32 kgs)

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