The Master Lock No. 8170D U-Lock features a 6-1/8 in wide hardened steel body for maximum strength and reliability. The 1/2 in Dia double locking shackle is 8 in long and made of hardened steel, offering extra resistance to prying, cutting and sawing. The disc key cylinder prevents picking. The limited lifetime warranty provides peace of mind from a brand you can trust.

Product Details: 

• Body Material: Steel
• Body Width: 6-1/8 in
• Color: Black
• Height: 8.25 in
• Includes: Bicycle Bracket
• Key Type: Keyed Different
• Length: 10.63 in
• Lock Type: Double
• Shackle Clearance: 8 in Vertical 4 in Horizontal
• Shackle Diameter: 1/2 in
• Width: 6.75 in

Features:

• Hardened steel body resists cutting, sawing and prying
• Double locking shackle for great pry resistance
• Protective vinyl coating helps prevent scratching
• Integrated disc keyed locking mechanism for maximum pick resistance
• Carrier bracket included for easy transportation