Mandated by most race organizations, the Vortex V3 Lever Guard is adjustable to three positions. The guard includes three M5 X 12 FHCS. Only two are required for installation. Use a thread locking agent on screws and check for tightness after each ride. Installation should be performed by a Certified Mechanic. The V3 Lever Guard is meant for race use only. Bar end must have an .875 inch diameter to work with this part.