ABUS Bordo Combo 6100 5.0 mm heavy-duty steel bars and links for high security Link construction offers compact folding and transporting The bars, the links, the case as well as supporting elements of the locking system are made of special hardened steel ABUS long lasting 2-K digit combination lock for high protection against picking (PIN settable) Rattle free holder with velcro or bottle cage mounting fits most bikes