8mm or 12mm Shank - Large Tongue & Groove Joint Assembly Router Bit Set (2pc)Complete your hardwood tool collection with the Valiant tongue and groove router bit set. Use these tongue and router bit tools to enhance your hardwood working performances and create beautifully handmade furniture on your own. Highest quality, 2 wing carbide cutters. Great for kitchen and bathroom doors, office cabinets, flooring tables, bedroom shelves, outdoor frames, walls and more. Boasting high quality materials, balanced craftsmanship and a