Rotacraft rc9004 24 piece hss carving and milling set rotacraft rc9004 p this hss carving and milling set from rotacraft features 24 rotary tool accessories which fit all makes and models of mini rotary tools the high speed steel pieces come in four various shapes round cone taper and cylinder making them ideal for mini carving and milling burrs p rotacraft rc9004 24pc hss carving milling set