Precision-engineered Sunnen AN-815 honing head delivers micron-level accuracy for cylinder refinishing. Aircraft-grade aluminum housing with hardened steel mandrel ensures durability in heavy-duty applications. Self-centering design maintains consistent bore geometry for automotive/motorcycle engine rebuilding. Portable configuration enables on-site machining in field service or small workshops. Mirror-finish chrome plating resists abrasive wear during extended use. Interchangeable stone carriers (sold separately) accommodate multiple grit sizes. Ideal for professional mechanics restoring vintage engines or performance tuners seeking perfect ring seal. Includes integrated coolant channels for reduced heat buildup during operation.