Kryptonite Keeper Mini 6-pin padlock with key locking mechanism.12 mm hardened steel horseshoes. New, more durable DEADBOLT mechanism. Includes 2 ergonomic keys. Package includes bike padlock holder. Protective vinyl coating. Key Safe program - if keys are lost, 1st pair of standard replacement keys sent free of charge (registration required) Dimensions: 8.3cm x 15.2cm Level of protection: 5/10