DiamondCore Rotary Tools have diamonds embedded all the way down to the shaft, not just on the outer edge. Ideal for cleaning out glaze that ran down into a hole. Use them on bisque, high-fired clay, glaze drips, porcelain, tile or glass. For longevity use water, high speed and gentle pressure. "Let the Diamonds do the work." 2mm diameter x 15mm length. Shaft diameter 1/8".
Use all appropriate safety precautions. Keep out of the reach of children.