Hardened 3T manganese steel chain with 10mm 6-sided links Integrated chains secure with Evolution Series 4 lock head with pinless design to secure chain to a hardened deadbolt Enclosed in nylon-webbing sleeve to protect paint from scratches Comes with 3 stainless steel keys including a lighted L.E.D. key Free 1-year $750 anti-theft protection Lifetime manufacturers warranty against manufacturing