Amazon.com: PFERD Bench Grinding Wheel Carbide Type | 6x3/4x1 inch, vitrified Bond, Silicon Carbide, grit Size 80 | 61786 - for use on Hard Materials, Included bushings 3/4, 5/8, 1/2 inch : Industrial & Scientific
3M™ Cubitron™ II Vitrified Grinding Wheel 93VE | 3M United States
225 Dia x 5 Thick x 60mm Bore - BLUE 54-I - USA -- Vitrified Wheel – Global Tooling & Supply