Click to expand Tap to zoom Helix Hellion Dry Core Diamond Bits by Helix Sale $132.50 | / SKU PDCB3 3" - $132.50 5" - $231.29 3" 5" Size Currently Available 1 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Helix Hellion dry core diamond bits grind through porcelain and ceramic like a hot knife through butter. No water needed...ever. Long lasting and designed to be used at high speeds on an angle grinder. Fits on a 5/8-11 threaded spindle.