Application - Ideal for cleaning and surface-finishing items made from gold, bronze, copper or brass<br><div>Bit Diameter Inch - 1/8"<br><div>Bit Diameter mm - 3.2 mm<br><div>Max. Operating RPM - Do not run in Excess of 15,000 RPM<br><div>Overall Length - 1.85<br><div>Shank Diameter - 0.015<br><br></div></div></div></div></div>