The Master Lock No. 8170D U-Lock is a high-security bike lock designed to resist cutting, prying, and picking. With a hardened steel body and shackle, it offers maximum protection for your bike, while the included carrier bracket makes it easy to transport.

• Hardened steel body and shackle for extra resistance to cutting and prying
• Double locking mechanism enhances security
• Protective vinyl coating prevents scratches
• Disc-key lock provides anti-pick protection
• Mounting bracket included for easy transportation

Dimensions: 4 in x 8 in shackle, 1/2 in diameter
Warranty: Limited Lifetime Warranty