CNC precision-ground flutes for repeatability, chatter-free operation and longer life Sectional fluting enables burrs to cut on the radius as well as the body of the tool 100% inspection of high-temperature brazing to ensure structural integrity Shanks are made from high quality alloy steel hardened to HRC 45-49 to ensure maximum strength and durability Set includes; SA-3DC 3/8in Cylindrical Carbide Burr SC-3DC 3/8in Cylindrical Ball Nose Carbide Burr SD-3DC 3/8in Ball Carbide Burr SE-3DC 3/8in Oval Carbide Burr SF-3DC 3/8in Tree Radius Nose Carbide Burr SG-3DC 3/8in Tree Pointed Nose Carbide Burr SL-3DC 3/8in Included Angle Carbide Burr, 1/4in shank SM-4DC 3/8in Pointed Cone Carbide Burr, 1/4in shank dia