28 Piece Carbide Burr Set. Drill America Solid Carbide Burs are designed for cleaning out material in a wide-range of products including wood, plastics, stainless steel and other metals. Solid Carbide Burs have a long tool life and faster cutting speeds than other substrates. They are double-cut style and have rows of cutting teeth in two intersecting directions for fast material removal and a rougher finish. Drill America Solid Carbide Burs come in many shapes and sizes. Shapes include ball, cone, flame, tree and cylindrical. Sizes range from 1/16" to 1" in diameter with round shanks. 6” length burs available in select shapes and sizes.