Hitachi 728007 7/16-Inch Quick Change Plug Cutter (Discontinued by manufacturer) This 8/16-Inch bit is ideal for repairing holes in wood Hitachi DuraCore treated products are manufactured utilizing a proprietary technologically superior to cryogenic treatment. DuraCore is not a coating, so it will never wear off or chip away The bit cuts out a wood plug so it can be filled into another piece of wood with a hole that needs to be filled Comes with a 30-day limited warranty