Metabo Abrasive Grinding Wheels are designed for a wide range of Heavy Duty, Super Duty, and Extreme Duty applications. Formulated with premium abrasive materials, Metabo offers a wide product line of professional quality grinding wheels from 3" to 9" for applications ranging from general purpose to proprietary formulations for specialty metals. - ORIGINAL: Cool grinding in General Purpose applications for Fast & Reliable Results. - LONG LIFE: Cool grinding in Tough applications for Longer Life with Fast & Reliable Results. - PLUS: Smooth and Cool grinding in Toughest applications for Extended Life, Improved Productivity, High Versatility of materials and applications. - SUPER: Contaminant free, Smooth and Cool grinding in Toughest applications for Extended Life, Improved Productivity, High Versatility of materials and applications. - M-CALIBUR: Contaminant Free, Extremely Cool grinding in Extreme Performance applications for Longest Life, Unmatched Performance and Productivity, Lowest total cost of removal, Greatest Versatility of material and applications.