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 tubing is bolted to the engine mount of the bike and the skid plate is bolted onto it. The steel tubing has three mounting points to prevent them from rotating in the event of a low side. The guards are also braced together by a crossbar in order to further increase its strength. We use highest grade commercially available 12.9(177,000 psi in tensile strength) wherever possible. The long bar is made of billet aluminum. Rest assured that you are getting the best material commercially available.