Drill America solid carbide double cut bur offers long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems. Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications. Round shanks allow use with a wide variety of toolholding systems. Double-cut style has rows of cutting teeth cut in two intersecting directions for fast material removal and a rougher finish.