Solid Carbide Inverted Cone Shape Burrs are now for sale by Bisco of Florida, Inc. Solid Carbide Burrs are used in high speed die grinders to quickly and accurately grind metal. Solid Carbide Burrs are USA made and distributed by Bisco of Florida available in single, bulk and wholesale quantities. Bisco sells solid carbide burrs, carbide burrs, and carbide tipped burrs. Bisco also distributes cylindrical, ball, egg, flame, tree, and cone shape burrs.