The Kryptonite 955 Mini KryptoLok Series 2 Chain Lock gives you the security of a U lock with the smaller, more convenient package of a cable lock. The links on the lock were constructed of 3t manganese steel and are 9mm wide. They feature a pin less link design to secure the chain to the deadbolt, which means there are no weak links in the chain to pry open. The high security disc style lock cylinder is pick and drill resistant to keep you from losing your steed while you are inside running errands. The lock secures with a talon style deadbolt. The entire chain gets sheathed in a durable weather resistant nylon sleeve, which keeps the paint on your bike from chipping. The chain design also makes it easier to carry than a traditional U lock. Kryptonite's 955 Mini KryptoLok Series 2 Chain Lock includes 2 keys. The Kryptonite Key Safe Program is available if you register your key, you're able to get a new one if the need arises. It comes in one size 21. 5in long and one color.