The Master Lock 8170D U-Lock Bike Lock with Key features a 6-1/8 in. (15 cm) wide hardened steel body for maximum strength and reliability. The 1/2 in. (13 mm) diameter double locking shackle is 8 in. (20 cm) long and made of hardened steel, offering extra resistance to prying, cutting, and sawing. The disc key cylinder prevents picking.. FROM THE MANUFACTURER The object is to get away on your bike. Not for someone to get away with it. Security doesn't get any tougher than this. These locks are built with double locking shackles and high-security disc cylinders. Pliable rubber coated shackles protect your bike.

Vinyl coating for weather and scratch resistance. 6-1/8-inch by 8-inchby 4-inch. Includes carrier bracket for storage convenience. Disc key for additional anti-pick protection. Affordable U-Lock Protection. Includes one u-lock bike lock, two keys. Bike lock body is 6-1/8 in. (16 cm) wide, with 8 in. (20 cm) shackle length, 4 in. (10 cm) width and 1/2 in. (13 mm) diameter. Bike lock features a hardened steel body and double locking shackle for superior cutting and prying resistance. U-shaped steel bike lock with key; Includes carrier bracket for easy transportation. Outdoor heavy duty bike U-lock is best used as a bicycle lock.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.

Material: Vinyl Wrapped Steel. Item Dimensions LxWxH: 9.8 x 7.33 x 1.33 inches. Lock Type: Key Lock. Special Feature: Heavy Duty. Brand: Master Lock. Date First Available: April 9, 2008. International Shipping: This item can be shipped to select countries outside of the U.S. Learn More. Domestic Shipping: Item can be shipped within U.S. Best Sellers Rank: #3,307 in Tools & Home Improvement. Customer Reviews: 4.6 out of 5 stars 2,945 ratings 4.6 out of 5 stars. : B0017L4PAC. Warranty Description: ?Limited Lifetime Warranty. Batteries Required?: ?No. Batteries Included?: ?No. Special Features: ?Heavy Duty. Item Package Quantity: ?1. Finish: ?Vinyl Coating. Size: ?6-1/8 inch U-Lock. Is Discontinued By Manufacturer: ?No. Item model number: ?8170D. Country of Origin: ?China. Product Dimensions: ?9.8 x 7.33 x 1.33 inches. Item Weight: ?1.96 pounds. Part Number: ?8170D. Manufacturer: ?Master Lock. Item Weight: ?1.96 Pounds. Shape: ?U Shape. Included Components: ?... Finish Type: ?Vinyl Coating. Number Of Pieces: ?1. Color: ?Black. Style: ?Lock. Material: ?Vinyl Wrapped Steel. Item Dimensions LxWxH: ?9.8 x 7.33 x 1.33 inches. Lock Type: ?Key Lock. Special Feature: ?Heavy Duty. Brand: ?Master Lock.