The Scissors Type Piston Ring Compressor is a manual service tool to compress piston rings uniformly around the piston during installation. The tool uses a scissor-style tightening mechanism that applies controlled pressure, allowing the rings to close evenly without shifting from their grooves. This controlled compression ensures the piston can be guided smoothly into the cylinder bore without damaging the rings or cylinder surface.Attributes:• For Bore Diameter of 158.80mm (6.25 in).• Offers consistent performance during repeated use.• Avoids uneven force application on individual rings.Applications: The Scissors Type Piston Ring Compressor is used during engine assembly and service operations where pistons must be inserted into the cylinder bore.