Overview

• Cobalt is harder than high speed steel and provides better wear resistance It is commonly used on high tensile alloys
• Gold provides a polished finish on a cobalt or high speed steel tool It is commonly used on aluminum alloy, titanium and plastic
• Regular, also known as medium spiral bits, are used in general purpose applications They are used on soft, nonferrous materials
• Spiral flute reamers are used in blind and through-hole operations They are used to bridge interrupted cuts
• Straight shanks are used for general purpose applications The shank is smaller than the drill bit diameter They are used with portable drills and drill presses on ferrous and non-ferrous materials