W.L. Fuller 11660500, 1/2" Standard Type Four Flute Plug Cutter With 3/8" Shank. Designed for clean cutting and hardened for long life. These four-bladed Plug Cutters do not eject the plugs. The plug remains in the board and can be broken out with a screwdriver or the board can be sawed to free the plug. These tools cut fast and make smooth chamfered plugs for easy starting in counterbored holes. Made of Carbon Steel and heat-treated for long tool life. Suitable for both soft and most hardwoods. Plug diameter is slightly larger than counterbore diameter for a tight fit every time.