Rockbros Bike Chain Lock Heavy Duty Anti-Theft Bike Locks Chain, And Grill. Product Features Double Open Design-Combination Lock or Key Lock: 4-digit combination locking mechanisms for high security bike lock, our bike chain lock is resettable for 10,000 sets of passwords combination for the lock and the original password is?0000?.What?s more, it come with 2 keys, when you forgot the password, you can use the key to lock and open. Thicker Bike Lock and Long Enough Chain: The diameter of this bike chain lock is up to about 17.19mm, which is strong enough to provide an anti-theft performance.Besides, the bicycle lock is 3.2ft(96cm) long, you can lock two or more bikes at the same time, which is more convenient. High quality: This bike lock made of high-strength durable metal material.Zinc alloy lock cylinder, hardened steel material, and covered with ABS plastic,which is strong and sturdy. The heavy duty material makes the lock wear-resistant, rust-proof and cut-resistant. Durable Anti-slip Cloth Cover: A high-quality polyester protective sleeve is used to make the chain lock more smooth, durable and wear-resistant. It won?t scratch the body, protecting the perfect appearance of your bicycle. and no noise while riding. Wide Application: The bicycle chain length 3.2 feet/ 96cm and weighs 0.93lb/420g. ROCKBROS Bike Locks prefect for motorcycles, bikes, e-bikes, gates, fence, and even lawn mowers, ladders, sports equipment etc. Note:Please don't leave your bike locked outside for long periods of time. Especially in high crime areas. No bike lock is 100% secure! Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!