This purchase is for a set of bottom engine guards for the above bike model. The kit comes with both bottom guards and does not include the set of top guards. The steel tubing has two mounting points on each side preventing them from rotating in the event of a low side. They are also braced together in the middle to further increase the strength of the guards. 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.