9/16" Diameter Hex Shank Reamer. This spiral flute reamer has a point diameter of 3/8", a flute length of 5-1/8", and an overall length of 9". Used to align existing holes prior to bolt oor rivet installation. Point is tapered to permit entry into overlapping holes. Short length facilitates use in areas with limited access. Heavy-duty hex shank designed for portable pneumatic tools.