High Strength Alloy Steel Chain:The inner chain is made of 6mm high-grade alloy steel and will not be cut and opened by thieves. Durable and safe to provide cut resistance and a protective coating to prevent scratching. Weatherproof Cloth Cover For Protection:A special rain-proof, dustproof and friction-proof cloth cover outside the chain, which plays a good role in protecting the chain and making the chain lock more durable. The cover also keeps your hands away from the metal chain, making it more user-friendly. Easy To Set Your Combo:Default code is 00000.Turn the plastic knob 90 degrees clockwise to the designated position, then set a new code (recommend to set 00001 first, making sure the numbers are lined up with the pointer). Then turn the knob back to the original position.The new password is set successfully! Secure 5-digit password combination:It offers 100,000 password combinations, 10 times harder to crack than a 4-bit password, making it nearly impossible to crack. Save the trouble of carrying the key, just enter the password to unlock, very convenient. Suitable For Bicycles Motorcycles:With a length of 90cm (35.4in), you can lock the wheel to posts, trees, railings and other fixtures. It can also be used to lock doors, yard fences, sports equipment, barbecues, ladders, anything you need to lock.