This XSU lock comes with a massive 1.5M heavy chain. All models feature a unique anti-twist shackle, as well as drill and ice-spray proof and pick-resistant key barrel. The chrome steel U-bar is saddled at both entry points with wedge-resistant collars that reinforce the strength at the most common attack points. Used with XENA chains or through the wheelbase of a motorcycle or hasp locking device, the XSU is an extraordinarily strong and effective lock for any application.