Material: cemented carbide carpentry tools, industrial grade cutters, fully enclosed lubricated bearings, very sturdy and durable, with anti-backout design. Hardened steel body with anti-rebound function. Teflon coating resistant to heat and construction. Size: This stackable adjustable creasing tool is equipped with 5 blades, a cutting depth of 12.7 mm and a 8mm handle. Used for CNC routers and other automatic routers and desktop portable routers. Versatility: Using these tongue and router bit tools can improve your hardwood processing performance and make your own beautiful handmade furniture. Suitable for kitchen and bathroom doors, office cabinets, floor tables, bedroom shelves, exterior frames, walls, etc. Suitable for: This set of grooving and grooving tools is really versatile and convenient to use. Suitable for wood, MDF, particle board, compact plywood; please avoid cutting ferrous metals and other materials, such as steel, iron, sand, etc. Important Note: The cookie cutters should be used one at a time . The blade stack is not crowded. The good support between the blade and the body can bend and deform the body when tightening.