Flush Trim Router Bit Set: 4 flute cutter straight router bit with 8mm shank, cutting height: 30mm/40mm/50mm, cutting diameter: 14mm/16mm/16mm with an top end bearing. Industrial Grade Router Bits: Made of high quality C3 Micro-grain Carbide with Teflon Coating for heat-resisting and long-lasting performance. Efficient cuts and extremely durable. Anti-Kickback Design: Ideal flush trim router bit with Carbide-tipped edge, 4-flute design help to remove chips and make your job clean and smooth. Top End Bearing Router Bits: It contains a enclosed ball bearing for smooth running and accurate trimming cuts for laminates and template work. Woodworking Cutting Tool: Use on CNC and other automatic routers as well as hand held and table mounted portable routers. Can cuts all composition materials, plywoods, hardwoods, and softwoods