High security chain High grade molybdenum/chrome/nickel alloy steel. Square section gives increased resistance to boltcutters. Through hardened and case hardened for resistance to hacksaws and boltcutters. Increasee weld thickness for extra tensile strength. Small internal link dimensions give increased lever resistance. Zinc plated and clear passivated for corrosion resitance. All chains tensile tested and batch hardness tested. Sleeving Close woven twisted synthetic fibres. Resistant to chemicals. Shrink resistant. Abrasion resistant. Gives maximum flexibility and compacts easily. Lock - E.C. Series 120 High quality solid brass block lock covered with a thick armour plating layer of case hardened steel for hacksaw and boltcutter resistance. Brass lock gives smooth weather resistant operation. Close shackle, double slot design gives greater strength and protection against levers and boltcutters. Plastic coating gives protection to lock and protects paintwork from damage - also make slock easy to handle. Recessed key entry point and rotating anti-drill guard protects the cylinder. Chrome plated steel shackle with steel ball locking. Hardened steel shackle with steel ball locking. Stainless steel phosphor bronze springs. FROM £64.99