Drill America taper shank drills have a mores taper shank allows the tool to be inserted directly into the machine's spindle to facilitate high-torque applications such as large cut diameters. They are made to fit mores tapered holders. Drill America cobalt taper shank drills display high red hardness, permitting speeds up to 30 percent greater than with conventional M2 high speed steel, and are especially effective in drilling tough, high tensile strength materials like stainless steel, Inconel, and titanium.