The purchase is for a set of engine guards for the above bike model. The engine guards feature removable skid plates can be inexpensively replaced without purchasing a new set of steel guards. The steel guards feature three attachment points on each to prevent them from rotating in the event of a low side. We use highest grade commercially available 12.9(177,000 psi in tensile strength) wherever possible. Rest assured that you are getting the best material commercially available.