The Keeper 12 bike lock from Kryptonite is a "Moderate Defense" lock with a 2 out of 6 rating on A&Js' security scale. This lock is the ideal lock for low crime areas as well as those that are well lit. The 4" x 8" U-Lock with 1/2 inch hardened steel shackle is designed to withstand attacks with hand tools and comes in the Bent Foot design. The cylinder has a disc-style for high security.

Dimensions:
4" x 8" x 1/2"
(10.2cm x 20.3cm x 12mm}