Technology:• 9mm hexagonal chain with fabric sleeve to prevent damage to the bicycle's paintwork• The chain, the case as well as supporting elements of the locking mechanism are made from special hardened steel• ABUS Plus cylinder for high protection against manipulations, e.g. picking• Automatic cover for the keyhole against dirt & corrosion Transport:• Convenient compact transport by wrapping the chain around the seat post (for 85 cm length)• For the protected transport we recommend the frame bags ST 2250 or Oryde 2200 Tips:• This lock can be ordered keyed alike to other locks. This means several locks would match one key, respectively key code• Very handy use because only one end of the chain must be locked