Complete set of 1/4" shank rotary burrs designed to shape and trim steel, cast iron, and other ferrous metals. Also ideal for use with composite materials. Can be used with any die grinder or high speed drill. Each set contains a selection of nine cylindrical (Type-SA) and tree shaped (Type-SF) carbide burrs suitable for most applications. Comes complete with case. Not recommended for use on aluminum. 2 lbs (0.5Kg) shipping weight.