remove unwanted chassis and swing arm flex..great upgrade to replace worn or stock rubber swing arm pivot isolators…use with or without a spherical bearing kit for the ultimate in rear swing arm control, no more wallowing in corners or side loading and shifting of the rear tire track..keep it in line the way it should have been done at the factory, 2 heights for swing arm angle changes, socket for nut fits easily in hole, smooth and rounded edges for a clean look, can be powder coated or anodized for color matching on your show bike. install by trained tech using factory manual..no adjustments or changes to frame or swingarm needed