Kryptonite KryptoLok combination U-Lock provides 6 out of 10 protection on Kryptonite&';s security rating scale. A 4-digit, resettable combination allows the protection of a U-Lock with the convenience of not having to carry keys. Included FlexFrame bracket carrys the lock securely during transport Double Deadbolt - Strongest Combination U-Lock on the market 12.7mm shackle Durable easy to use dials Includes Flexframe bracket Rotating cover protects from dust and debris Easy to use 4-digit resettable mechanism protective vinyl coating Combo Safe Program Lock Style: Combination Dimensions: 4" x 9" (10.2cm x 22.9cm) Weight: 2.9 lbs Color: Black