Vortex makes all of their sprockets from incredibly durable 7075 T6 aluminum that they CNC machine so each sprocket has an unrivaled amount of precision. Because they are manufactured to such tight tolerances, many riders report that sprockets from Vortex have a lifespan that rivals some steel sprockets. Vortex Aluminum Sprockets last through the elements too with the clear anodized finish and gunk clearing grooves between each tooth keeping harmful elements at bay. With a number of racing teams and riders using Vortex sprockets, there should be no doubt that Vortex is king of the hill when it comes to sprockets for your machine.