The mini Bulldog is tough yet weighs under two pounds. Lock uses the legendary MCylindertm mechanism for theft deterrence. Antidrill and pickproof guts make this a supersecure package. Dual Steel Bartm locking mechanism delivers up to 10 tons of pull strength. Features a massive 13mm 12 inch hardenedsteel shackle for strength. Ballistic plastic holds up to the most aggressive trashing and thrashing. Lock is tough but gentle on your bike's finish plastic, rubber o