The 1.5m Monster Thatcham Approved chain & padlock combines a 14mm Ni-Cro-Mo hex link chain and an ultra-strong padlock with hardened boron steel armour casing for maximum protection against attack. The Thatcham Institute for Vehicle Security is recognised by insurers as the UK’s leading tester of vehicle security products. Products with the Thatcham label have been demonstrated to comply with The British Insurance Industry’s Criteria for Vehicle Security - the toughest set of standards ever to be applied to motorcycle locks and alarm/immobilisers. As a result, many insurance companies offer significant discounts to those who use these Thatcham Approved Products.