PL-G1L IP65 Waterproof Bike U Lock Anti-theft Bicycle Lock with Mounting Bracket/Keys for Bicycle Motorcycle ?Sturdy & Durable: This bike lock is made of alloy steel which is cutting-resistant,leveraging-resistant,and drill-resistant. The bicycle lock will provide your bike with more safety ?Safer: The lock cylinder of the bike lock is made of C grade Zinc alloy blade,which has a precise structure to prevent technical opening. The bike U lock comes with 3 keys that have complex serpentine slots,it will be safer ?IP65 Waterproof & Dustproof: The bicycle lock is waterproof and dustproof and suitable for use in a variety of environments ?Exquisite Workmanship: high-temperature quenching,hardening,and thickening the lock beam. The locking beam has undergone multiple heat treatment processes to improve the hardness and strength and effectively resist external force damage ?Portable Size: Comes with a mounting bracket that is suitable for all circular rods in diameter 2-4cm. With the portable size,you can put the 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 which enables you to store your bike lock quickly when out on a ride. The silicone cover of the U lock will protect your bike from scratches. And it will prolong the life of your U lock Specifications: ?Item model number: PL-G1L ?Inner diameter of bracket: about 2-4cm ?Process: heat treatment anti-rust electrophoresis process ?Material: alloy steel ?Surface material: full silicone cover ?Lock cylinder technology: serpentine slots ?Waterproof and dustproof: IP65 ?Applicable models: bicycles,E-bikes,some motorcycles Package included: ?1 x Bike U Lock ?1 x Bracket ?3 x Keys ?1 x Chinese and English Manual ?Other items not included