Tungsten Carbide Tipped Dowel Drill With V Point . Suitable For Drilling Tear Free Through Holes In Natural Wood And Man-Made Boards (Including Paper/Plastic Coated And Veneered). Drills Have A Cylindrical Shank With Flat And Length Adjusting Screw. For Use On Automatic And Point-To-Point Boring Machines.PTDTREDIRIT2016137