ROCKBROS 5-Digit Combination Bike Lock Lightweight Anti-Theft Cable BlackEASY TO USE: Easy to follow 3 simple steps to set and reset your own desired number combination allowing thousands of personalized combination code options. (Initial password 0000). HIGH SECURITY: 5 dial combination with a high security level, much safer than other 4 digit bike combination lock. Theoretically the chance to crack the combination is only 1 100000. It will take more than 80 hours to crack the combination. STURDY &STURDY: Covered with