The OF41 Patriot Disc Lock from Oxford is the same as the OF40 Patriot Lock but features a longer 75mm shackle pin. This extra length allows the OF41 version to be used as a chain lock as well as a disc lock for greater versaility and practicality. The OF41 is designed to fit most motorcycle disc brakes so it can be used with a huge range of motorcycles, both large and small. It's lightweight and compact so it can be transported easily when not in use and even comes complete with a carry bracket. *Thatcham Approved 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.