DEWALT DW5468-1-1/8" X 8" X 10" Rock Carbide SDS+ Drill BitSDS Plus 2 Cutter Drill Bits have a strong tapered core to help resist flute breaks, especially when drilling deep holes. For optimal drilling speeds, the two stage flute design features a variable helix pattern that quickly moves debris away from the contact zone. Plus, the two sharp, carbide cutting edges deliver clean, round holes for secure anchor installation. If you have our bits, we have your back. Features Aggressive material removal: Two