Chain Size14mm six sided chain links made of 3T manganese steel. | Anti-theft ProtectionRegister your product online to activate the optional Anti-theft Protection. In the unlikely event the product is defeated when used properly Kryptonite will pay out up to a certain value depending on the security value of the product. Visit our official website for further information. T&C’s apply. | Key Safe ProgramRegister your keys online and Kryptonite will ship you 2 keys, globally, in the event you lose them. | Stainless Steel Keys3 stainless steel keys — including new key design and one LED replaceable key fob. |