Intekin Bike U Lock Heavy Duty Bicycle Lock 16Mm U Lock For Bicycle Heavy Duty U Product Details STURDY: This bike u lock is made of 0.63inch(including 0.1inch PVC cover) carbon structural steel which is cutting-resistant, leveraging-resistant. The PVC cover makes u lock can resist corrosion from dust and dirt to prolong the life of your bike lock. NO BLOCKING: The lock cylinder of u lock is made by zinc alloy blade, which has a precise structure to prevent technical opening. With the lock dust cover and cooper lock cylinder, no need to worry about blocking when opening the bicycle lock. PORTABLE: The size of the u lock is 8.3*5.7inch. Comes with a mounting bracket that is suitable for all circular tripod in diameter ?1.18inch. With the portable size, you can put this bike u lock into your bag or mount it on the frame of your bike. EASY INSTALLATION: The mounting bracket holder is easy to install, you can refer to our instructions to install it. This convenient installation enables you to store your bike lock quickly when on a ride. Enjoy your beautiful day like never before! 3 KEYS: The bike lock comes with 3 keys which are specially designed. This keys of the bicycle u lock makes duplication difficult and can prevent technology unlocking as it has complex serpentine slot. It's safer for your beloved bikes. 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.