Features:Turn the to complete the lock and fix, keyless , convenient and quick.The lock core and the lock buckle are automatically fitted and inlaid, firmly locked, not slack, and anti- nce.Five-digit code lock, unlocked a variety of digital combins, the unlocking rate is 1/100000, safe and reliable, required, convenient to use.The lock is of alloy aluminum material, and the concave and convex inlaid along the seam are firmly combined, safe and anti-.Lengthened and thickened chain, the combin of steel alloy and nylon, to dirt, do not , and durable.Specifications:Item type: Bike Chain LockMaterial: Steel alloyColor: BlackSize: Approx. 0.9m/3ft Pas level Pas possibility Time required to open Difficulty of opening sets of pass 1000 possibilities 50 minutes easier Four sets of pass 10,000 possibilities 500 minutes difficult Five sets of pass 100,000 possibilities 5,000 minutes ly difficult Package Included:x Chain lock