The Monster Thatcham Approved lock from Oxford is an ultra strong disc lock suitable for use with all motorcycles. Featuring a hardened Ni-Cr-Mo alloy steel shackle and double locking mechanism with 2 hardened steel bolts, the Monster provides an impressive level of security and is designed to deter even the most persistent, experienced thieves. With widened access points, the Monster is a lot easier to fit than other, smaller disc locks and can be used with motorcycles fitted with larger, thicker brake discs. The Monster can even be used with a chain to create a top quality, ultra strong motorcycle chain lock. 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.