Drill Bit Self Centering Vertical Pocket Hole Jig Dowel Drill Guide Woodworking Description: Dowel Drill Bit: This is a set of self centering drill bit tools for holding and centering while drilling and woodworking. Design: The height of the two feet can be adjusted according to the thickness of the board, making the drilling more accurate, a powerful woodworking tool. Parameters: Drill bushings: 3/4/5/6/7/8/9/10mm, minimum diameter 60mm/2.36 inch, maximum diameter 70mm/2.76 inch. Wide Application: The dowel drill bit kit is suitable for fixing on boards of various thicknesses, two claws are convenient for quick positioning of the hole center, dust removal groove design. Material: Made of aluminum alloy, high hardness, wear resistant, rust proof, durable, easy to use. Package Includes: 1 Piece Vertical Self Centering Dowel Jig 8 Pieces Drill Bushings(8 Sizes)