Features 2Mm Micrograin Tungsten Carbide Tips For Cutting The Most Abrasive Materials To Give Extra Long Life.Ptfe Coated Indicated By Distinctive Black Colouring.Can Be Used On Hardwood & Softwood Fibreboard Plywood And Particle Board.Etched Dimensions On Extra Long 40Mm Shanks For Quick Identification.By Raising The Cutter The Top Quirk Is Removed.PTDTREDIRTR47X12TC