Create strong secure joints with Cindoco® Spiral Groove Wood Dowel Pins. These hardwood spiral groove dowel pins have unique spiral glue channels to eliminate air pockets and to ensure good glue distribution for a strong bond. Spiral groove dowel pins are ideal for furniture building and repairs, shelving, cabinetry, and other woodworking projects. These spiral-grooved birch dowel pins are engineered to a diameter tolerance of +/- .005 with a moisture content of 6-8%.