Draper Silicon Carbide Bench Grinding Wheel, 200 X 25mm, - BG20025SA high quality, hard wearing silicon carbide bench grinding wheel with ultra fine grit. Suitable for sharpening tungsten carbide tip (TCT) tools and grinding non ferrous metals including alloys. Dry cutting use only. Manufactured with a 31. 75mm bore and supplied with five reduction rings enabling each bench grinding wheel to fit most bench grinders with a bore size between 12. 7 31. 75mm. 1 x Silicon Carbide Bench Grinding Wheel, 200 x 25mm, 120G