Cobalt Screw Machine Length Drills • Heavy duty construction • 135 self-centering split point eliminates walking and reduces thrust • Short length provides maximum rigidity for increased hole accuracy and extended tool life • Cobalt steel offers increased hardness, toughness, wear resistance and heat resistance • Recommended for drilling tough, high tensile strength materials and materials that generate higher cutting temperatures including high alloy steels, ferrous castings, titanium, inconel, stainless steels and other difficult-to-drill materials