High performance, ceramic aluminum oxide grain.Very uniform, high density grain structure is extremely durable and self sharpening for long life and cooler cut.Combines fast stock removal with long life for tough cutting applications.Ideal for foundry applications (gates, risers)., Aggressive cutting performance over a wide range of applications.Our unique Super-Lock??????????Hub combines both a mechanical locking system and chemical bond providing one e of the safest, vibration-free designs in the industry Super-Lock??????????Hub.All sizes reinforced with the highest quality fiberglass for maximum safety and performance.Designed to provide very long life for fewer wheel changes and less downtime.