New patent-pending pin-less link design secures chain to hardened deadbolt, offers no "weak" link in the chain due to the extensive holding power of the link itself against attacks * 10mm six-sided chain links made of 3t manganese steel * High security disc-style cylinder is pick and drill resistant; resists most common hand tools * Weather-resistant nylon sleeve prevents scratches to painted finishes; compact coiling for easy carrying * Includes 3 stainless steel keys, 2 standard keys and one with a high-intensity LED bulb for convenient, easy unlocking in the dark