DEWALT DW5404B25 2-Cutter Drill Bit, 3/16 in Dia, 8-1/2 in OAL, Spiral Flute, 4-Flute, 25/64 in Dia Shank

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SDS Plus® two-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. These bits are made in Germany and are GUARANTEED TOUGH®.