Description:  【Precision Cylinder Honing Stones】: Designed for automotive cylinder honing, this stones ensures smooth and accurate inner diameter polishing for optimal engine performance.  【 Metal Construction】: Made from   metal for long term durability,  for  professional or DIY auto repairs.  【Compac 】: Engine Cylinder Hone Stone  compact design allows easy handling and access to tight cylinder spaces, ensuring efficient grinding and finishing.  【Complete 3 Piece Set】: Includes three honing stones replacement ,   or replacement needs during work.  【Versatile Automotive Use】: Ideal for resurfacing cylinder walls, removing burrs, and restoring engine components to improve compression and longevity.  Specification: Diameter 51-177mm / (XL)   Size Chart:3cm/1.18inch Package Includes: 3 Engine Cylinder Hone Stones Replacement Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!