Click to expand Tap to zoom Helix Hellion Dry Core Diamond Bits by Helix Sale $92.86 | / SKU PDCB138 1-3/8" - $92.86 2" - translation missing: en.products.status.sold_out 3" - $151.43 4" - $190.00 5" - $264.29 1-3/8" 2" 3" 4" 5" Size 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.