This jobber length drill bit is made of high speed steel and has a 3/16 inch diameter, one-inch long shank. It is for use with abs, acrylic, aluminum, brass, composite materials, copper, maple, mdf, nylon, oak, pine, polycarbonate, pvc, steel. This jobber length drill bit has a black oxide finish. It is non-coolant through with a 3½ inch length. Plus it has 2½ inch straight flutes, and a 135 Degrees drill point.