Putting the connecting rod through first, simply place the piston (with rings) into the tapered end of the ring compressor. Tighten the compressor snugly around the base of the piston. Then lay the compressor flat on the engine cylinder bore. Product Features:Unit has a 4.000-in. to 4.090-in. Bore RangeBlue Anodized FinishMade from High-Quality Aluminum
