It made Superman weak in the knees the minute he spotted it, as it does would-be thieves and burglars when they spy it. It is Kryptonite, the tough break-resistant substance that makes bicycle and storage locks so secure. A Kryptonite lock will keep any errant thieves away from the bicycle zone because it is well known for its strength and resilience. Kryptonite New York bike chains and locks are hard to penetrate because of the 20 mm woven steel cables attached to the lock. A key is the only thing that will break this lock; a hacksaw just will not cut it. The trusted sellers on eBay have a large selection of bike security items like new and used Kryptonite chains and locks from reliable sellers with convenient shipping options for the discerning buyer. A ride is only as safe as its security, why ride a bike to work if you are only going to let it be stolen from the bike rack? The bicycle will not save much money if it has to be replaced monthly due to thieves.