HUMANISED DESIGN: Comes with 3 copper keys, so you'll always have a spare one. The motorcycle lock is wrapped with a flexible sleeve cloth, which is scratch-proof and wear-resistant. It will protect your heavy duty bike chain lock from scratches. WIDE APPLICATION: The length of the heavy duty motorcycle chain lock is 3.3FT and the weight of which is 5.62lbs. The motorcycle locks heavy duty anti theft can be used for motorcycles, doors, grills, ladders, sports equipment, etc. Heavier than other locks, but more secure. NOTICE: THE TOTAL LENGTH INCLUDES DOUBLE LOOP ENDS!. DURABLE: The u lock is made of 0.64inch(including 0.1inch PVC cover) carbon structural steel which is cutting-resistant and leveraging-resistant. The PVC cover of u lock can resist corrosion from dust and dirt to prolong the life of your heavy duty security chain lock. HIGH SECURITY: The bike chain lock is made of 10mm/0.4inch heat treatment hardening manganese steel square link which is resistant to cutting, breaking, sawing and shearing. This anti theft motorcycle lock is a perfect product for protecting your bicycle, motorcycle, and other valuables things. It will provide you high security. NO BLOCKING: The lock cylinder of motorcycle chain lock is made by zinc alloy blade, which has a precise structure to prevent technical opening. With dust cover and cooper lock cylinder, no need to worry about blocking when opening the motorcycle lock.