SECURITY & ANTI-THEFT:The upgrade bike/motorcycle chain lock cylinder is made of high quality alloy steel, anti-theft class up to B, which is certified to resist leverage attacks, has a precise structure to prevent technical opening and provides excellent anti-theft performance. Get the same security as a car door or anti-theft door! The 3 included pure copper keys are rust resistant with advanced serpentine slots, difficult to copy, high security.

STURDY & DURABLE: The upgrade bike chain lock is made of high tenacity A3 alloy steel. The outermost layer is covered with environmentally friendly Nylon cloth cover, wear-resistant and non-slip, not only protects the chain but also protects the car paint. The chain buckle diameter of lock is 11MM/0.31 INCH, bold chains ensure safe cycling, not like other 8 MM/0.31INCH bike chain lock very easy to be cut off, it is hydraulic shear resistant and dill-resistant, protecting the bike from theft.

EXTRA LONG: The length of the bike chain lock is: 1000 MM/39.37 INCH. You can use it easy to lock your bike/motorcycle to bike racks, fences, poles and more. It is widely used in mountain bicycles, road bicycles and motorcycles.

WATERPROOF & HEAT RESISTANT: The lock cylinder was made from waterproof and heatproof Zinc alloy, it will not rust, or out of shape even the temperature reaches 60 centigrade. The surface of the lock cylinder is nickel-plated to prevent rain and corrosion, so you don't have to worry about traveling in rainy days. The dust cover on the keyhole effectively prevents rain and dust from entering, extend the life of the lock.

PORTABLE CABLE LOCK: This bike/motorcycle chain lock is heavy enough 2.5 kg to keep your bike/motorcycle safe but light enough to carry around with ease. Intuitive locking mechanism, simply loop it around whatever you want to secure and a fixed object and snap it together to lock. With the portable size, you can comfortably put it into your backpack while riding.

AMAZING SECURITY: HIMIWAY upgrade heavy duty bike/motorcycle chain lock can withstand up to 18 tons of hydraulic shear, protecting the bicycle from theft. Please note that no lock is 100% safe. Never leave your bike in high-crime areas or leave your bike unattended outdoors for long periods of time.