Protect your JupiterBike with this 5-digit, easy-to-set combination bike lock. The zinc alloy lock is cased in a strong Abs shell and can be set to 100,000 possible codes, so there are no keys to lose. The 3.2 foot chain is made from drill-resistant hardened stainless steel and includes a polypropylene fabric sleeve to help prevent scratching and reduce the chain getting too hot or cold.