ONGUARD Beast #8016 Shackle U-Lock with Chain (security level 99 of 100) for maximum protection, with a solid hardened titanium reinforced steel chain with hexagonal chain link structure and rounded design that eliminates lever points for crowbars. BumbBlok double rubber-coated lock body, incl. 5 laser cut keys (1 micro-light and 4 extra grip keys - micro-light key projects a bright white beam), dimensions: 110cm (length) x 14.0mm (diameter) (3.5' x 0.55"), weight: approx. 5768g. U-lock can also be used alone as a disc lock.