Thieves will scamper with their tails between their legs when up againt this Pit Bull of a lock. 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 new 13mm 12' massive hardenedsteel shackle for strength. Ballistic plastic holds up to the most aggressive trashing and thrashing.Lock is tough but gentle on