The General Tools 840012 1/2" Fluted Dowel Pins (20). A fluted dowel pin has a series of parallel grooves cut along its length providing channels through which excess glue - that is used to secure the dowel pin in its hole - can escape as the dowel is inserted. This relieves the hydraulic pressure that might otherwise split the timber when the mating pieces are clamped together. General’s fluted dowels are ideal for creating strong and secure joins in furniture, cabinets, trim and special woodworking projects.