Safe & Resettable: bicycle chain lock with smart 5-digit combination, much safer than other 4-digit locks. Easy to set your own number combination._x000D__x000D_Sturdy & DurableIt is difficult to break through because the lock cylinder of the bike lock is made of zinc alloy. The bike lock is made of 6mm thick hardened steel chain, which is drill-resistant and anti-tech unlocking._x000D__x000D_Anti-scratch Bike lock is covered by a polypropylene fabric, which is scratch-resistant and wear-resistant is, anti-heat and anti-ice hands It protects the chain and prevents it from scratching your bike frame,._x000D__x000D_Convenient to useCombination locking mechanism provide keyless convenience and set your password own through simple steps. With the keyless convenience lock, you don't have to worry about losing the key or forgetting to take it with you. The code design saves you the hassle of carrying keys. The code is resettable, there are 100,000 combinations you can set. The default code is "00000"._x000D__x000D_MultipurposeChain lock combination lock is 1200mm long, long enough to connect 2-3 bikes together or attach your bike to a tree, gate, fence, railing. nder, a thick post and others to attach. The lock can also be used for motorcycles, scooters, e-bikes, skateboards, grills, ladders, doors, lawn mowers and many others.