Kryptonite Keeper 12 Long pin lock with key locking mechanism. 12mm steel horseshoes. New, more durable DEADBOLT mechanism. Includes 2 ergonomic keys. Package includes bike lock holder. Protective vinyl lining. Key Safe program - if keys are lost, 1st pair of standard replacement keys sent free of charge.(registration required) Dimensions: 10.2cm x 25.4cm Protection level: 5/10