Application: Professional router and edger with excellent concentricity for fast, smooth and precise cutting of laminate and template work, precise cutting of wood edges. Features: Straight slot router bit, using double-edged cutter and replaceable ball bearings, runs smoothly and has excellent concentricity, suitable for edge finishing. High-quality materials: Alloy flat head, 45# carbon steel body, surface covered with heat-resistant coating, durable, suitable for precise cutting in laminating and fixing work. Wide range of applications: The profile router can cut all component materials, particle board, plywood, hardwood and softwood, MDF and other solid panels, and is suitable for all kinds of woodworking cutting machines. Package contents: The router bit set contains 4 pieces 8mm shank copy router bits (8 × 1/4'' × 25.8 × 5/16'' × 25.8 × 3/8'' × 25.8 × 1/2'' × 25) . Professional woodworking router bit. Note: The data are all measured manually, please allow 1-3cm error due to