Task Tools T56007 7-Piece Dowel Drill Bit Set for Wood And Plastic Dowel drill bit for drilling smooth holes in wood and plastic True Centre tip for easy drill placement and precise starts Wide flutes for quick and efficient chip removal and faster drilling Precision ground for optimal accuracy Bit sizes: 1/8-Inch, 3/16-Inch, 1/4-Inch, 5/16-Inch, 3/8-Inch, 7/16-Inch, 1/2-Inch