Kryptonite's Keeper 880 Chain And Padlock features an 8mm, four-sided link chain and round padlock perfect for use in low to moderate risk locations. The heat-treated carbon-steel chain has a durable nylon cover to protect bicycles from scratches. The pass-through end link makes padlock attachment easy. And, the 70mm stainless-steel round padlock features an armor-protected shackle to defend against cutting attacks.