8mm shank planer with 6 bearings (1/8", 1/4", 5/16", 3/8", 7/16", and 1/2". Interchangeable bearings for cutting different rabbet depths produce smooth cuts on both surfaces. Industrial-grade tungsten carbide blade, heat- and deposit-resistant Teflon coating, and heavy-duty hardened steel body with anti-kickback design. Cuts all composite materials, plywood, hardwoods, and softwoods. Use on handheld and desktop routers. Features: 1. These solutions work best with a router table. 2. Use this method for cutting hardwoods. 3. They fit perfectly and align. 4. Made of cement carburetor, durable performance. Safety Instructions: 1. This product has blades and is not suitable for people under 18 years old. 2. This item is only used for industrial cutting/engraving and is not a hazardous article. 3. Take good protective measures for the drill bit to prevent fragments from flying into your eyes.