KnKut USA Made Cobalt drill bits are designed to drill tough, high-tensile materials and work-hardening materials like high strength alloy steels, stainless steel, titanium, manganese steel, armor plate, and inconel. It features a 135° split point that starts on contact and will not walk and hex shanks on sizes 3/16" and above to prevent drill from slipping in your chuck. KnKut Cobalt drill bits resist heat allowing our drill bit to stay sharper and last longer.