1.40-100mm,80-120mm and 110-160mm in diameter 2.Smooth gripping edge. 3.Spring loaded 4.Nickle-plated steel 5.PVC handles. 1.Replace piston rings without the danger of breakage or distortion with no adjustments needed.2.Universal design can be used on most vehicles.3.Works with piston rings 40-100mm,80-120mm and 110-160mm diameter.4.Smooth gripping edge to prevent damage to the piston ring.