Rockbros Bike Chain Lock Heavy Duty Anti-Theft Bike Locks Chain, And Grill. Product Details 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! Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.