The Milescraft 2332 5mm ShelfJigBit™ makes drilling 5mm shelf pin holes quick and easy. Made from durable High Speed Steel, this long lasting bit cuts clean and precise shelf pin holes for any cabinetry shelf project. The shank is ¼” in diameter and has a quick connect base for attaching to drills and drivers. The tip of the drill bit steps down to 5mm to make a smaller hole. This bit is designed to work with the Milescraft 1343 ShelfJig™.