B205SG300 - Double Cut Carbide Burs Tree Shape Pointed End 1/4? Shank Tree 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 2 / 63.5mm Diameter of Head 3/8/9.6mm Length of Head 3/4 / 19mm