Engineered for exceptional performance, Sunnen YY48 Abrasives deliver reliable, high precision honing in bores with keyways, ports, or other interruptions. Featuring premium silicon carbide abrasive in a vitrified bond, this stone ensures fast cutting action, excellent wear resistance, and consistent surface finishes. Designed for use with YY48 keyway mandrels, it is the ideal solution for achieving tight tolerances and smooth finishes in demanding applications across the automotive, aerospace, and hydraulic industries.