THE MOST COMPREHENSIVE WORK TOOL SET: It comes with a tongue bit, a ½" groove bit, a ½" groove bit, and a 45° locking miter router bit. Everything you need is here in one resource pack. MANY USES TO UNLOCK: Use these tongue and groove router tools to improve your hardwood work performance and make beautiful handcrafted furniture yourself. Ideal for kitchen and bathroom doors, office cabinets, floor tables, bedroom shelves, exterior frames, walls and more. < p>Unique design, durability and impact resistance ensure the sharpness of the blade , your first choice in quality. Hardened steel housing with anti-recoil protection. Heat and construction resistant Teflon coating. EXTREMELY VERSATILE WORKING TOOLS: This groove and slot cutter set is really versatile and practical. Suitable for wood, MDF, chipboard, plywood compact board; Please avoid cutting ferrous metals and other materials such as steel, iron, sand, etc.