[Stable and Durable] High quality folding bike lock made of zinc alloy and ABS, sturdy and durable with high protection against theft, breaking and cutting. Hamburg lock material is zinc alloy and special ABS material, which ensure the function of anti-theft, anti-cut, anti-breaking. [theft-proof design]: the surface of the lock cylinder is completely painted with rubber paint. The bumpers reduce noise during transportation, prevent damage to the bicycle frame, and can be locked directly to the door frame, protecting the folding lock and preventing the electric scooter from locking. [bicycle lock with 3 keys]: The bicycle lock has 3 security keys for daily use, you can leave another one at home in case of accidental loss. Note: The key can only be removed when locked. [flexible and portable]: The chain lock is equipped with special rivets for comfortable and flexible folding. It comes with a handy mounting bracket and can also be carried around with you. It is perfect for mountain bikes, road bikes, scooters, etc. to keep your bike safe anywhere and anytime. [package contains] lock*1, bandage*2, screw*2, key*3, door lock*1, instruction*1< /p>