Cobalt Jobber Drill Bits are designed with optimized geometries that deliver 3X more life than the competition. 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. Cobalt bits for drilling into metal.