These swingarm protectors fit into the the rear spindle and expand to a snug fit protecting the swingarm. Held in place thanks to there expanding design means installation is a breeze taking only minutes. They help keep those core components found on and around the swingarm area such as the rear brake caliper, disc, Rear sprocket and swingarm lifted up off the ground, out of harms way in the event of a crash, drop or slide.