DeWalt DD4321B12 #21 Cobalt Screw Machine Drill Bits 12Pcs. Germany new Heat-treated steel screws with smoothly

Heat-treated steel screws with smoothly rolled or cut threads and square heads

Three-flatted shank design provides better chuck grip and reduces slippage

Includes 3 blades

PlumbSite™ vial for easy reading

Hole in flute for easy wire pulling through walls

DeWalt DD4321B12 #21 Cobalt Screw Machine Drill Bits 12Pcs. Germany new Heat-treated steel screws with smoothlyDeWalt DD4321B12 #21 Cobalt Screw Machine Drill Bits 12Pcs. Germany Patented web taper is 2X larger than the competition for increased strength, rigidity and breakage resistance Optimized 135 degree split point gives exceptional service life and also allows the bit to start on contact Heavy duty flute design produces maximum durability Increased cobalt content provides exceptional wear resistance and longer life If you have a question about one of our