They are easy to fit and are retained by stainless steel spindles and stainless nyloc nuts, the kit comprises one large tapered slider, spindle, nuts, washers and a orange alloy cap. The CNC machined alloy cap locates into the rear wheel center and the larger Acetyl protector slider locates on the swinging arm side of the rear hub offering extra protection to the swing arm and left side of the machine. The larger slider is made from a high performance engineering Acetyl polymer. Practical and stylish and fitted in Minutes with easy to follow online Instructions. Please Note: If your axle has a cotter pin fitted this would have to be removed to fit this item. Check out more items to fit this model.