𝗦𝘁𝘂𝗿𝗱𝘆 𝗮𝗻𝗱 𝗗𝘂𝗿𝗮𝗯𝗹𝗲 - Quality Zinc Alloy and ABS made lock, sturdy and durable with high grade of anti-theft, anti-breaking and anti-cutting function. The hamburger lock material are zinc alloy and ABS special material, which have the function of Anti-theft, anti-cut, tamper-proof. 𝗣𝗟𝗘𝗔𝗦𝗘 𝗡𝗢𝗧𝗘: Please contact us immediately if the box of the product you received is 𝗔𝘀𝗵𝗲𝗱 𝗧𝗵𝗲𝗳𝘁-𝗣𝗿𝗼𝗼𝗳 𝗮𝗻𝗱 𝗪𝗮𝘁𝗲𝗿𝗽𝗿𝗼𝗼𝗳 𝗗𝗲𝘀𝗶𝗴𝗻 - The lock core surface is fully sprayed with rubber lacquer, and the anti-impact bumper during transportation reduces noise, effectively preventing damage to the bicycle frame, and can be directly locked on the lock frame, protecting the folding lock and preventing the lock from being locked. 𝗛𝗶𝗴𝗵 𝗖𝗹𝗮𝘀𝘀 𝗦𝘁𝗮𝗶𝗻𝗹𝗲𝘀𝘀 𝗦𝘁𝗲𝗲𝗹 𝗞𝗲𝘆 - 3 high class stainless steel keys，distinguished key mouth design to avoid mix opening. Also there are serial numbers, if lost, key remake is available. 𝗛𝗶𝗴𝗵 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 - Bicycles are mostly quick-release seats,there are security risks, can easily take away. Wheel and seat distance of 23cm or less, can lock the wheel and seat. after folding, the bike lock size 5cm * 7cm, compact, lightweight and convenient to store in top tube bag, saddle bag, etc. 𝗘𝗮𝘀𝘆 𝗧𝗼 𝗖𝗮𝗿𝗿𝘆, 𝗖𝗼𝗺𝗽𝗮𝗰𝘁, 𝗮𝗻𝗱 𝗙𝗹𝗲𝘅𝗶𝗯𝗹𝗲 - The Folding lock fits most bikes, it only weights 575g easy to carry featuring special rivets that make folding easy. If there is any product problem please contact us, we will solve it for you within 24 hours!