B206SH500 - Double Cut Carbide Burs Flame Shape 1/4? Shank Flame Shape Carbide Burs The chisel tooth pattern not only minimises tool chatter but reduces the chip to a granular shape, in most materials. Al Cut for rapid material removal of soft materials such as: Aluminium, Brass, Copper, Plastics that would normally load other cuts Shank Length 3 / 76.2mm Diameter of Head 1/2/12.7mm Length of Head 1 / 31.75mm