DeWalt DD4112B12 3/16″ Cobalt Screw Machine Drill Bit 12 Bits 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








