Onguard's 18mm tick shackle makes makes this 5112 mini U-lock one of the strongest small U-locks available. Use it to secure a bicycle or in combination with one of our heavy 14 or 16mm high security chains to make one of the most secure motorcycle or ATV locking combinations possible.

• X4 Quattro Bolt Locking Mechanism
• Incredible 18mm Ultra Hardened steel shackle provides maximum cut resistance
• Anti pull, Drill & pick M-key cylinder
• 5 laser cut keys with one micro light

Inside dimensions: 90mm x 140mm - 3.55" x 5.52"