ROUTER BITS SIZE: 4-piece flush trim router bit set with 1/4 inch shank. 6 interchangeable bearings: 1/16 inch, 1/8 inch, 3/16 inch, 1/4 inch, 5/16 inch, 3/8 inch. Various cutting heights: 1/8 inch, 1/4 inch, 3/8 inch, 1/2 inch. Cutting depth (changed by swapping bearings) COMPATIBLE MACHINES: For use on CNC and other automated routers as well as handheld and bench-top portable routers. Please Note: The short clamping of this router bit may cause bending ROBUST MATERIAL: Made of high-quality carbide, not easy to break. Ensures sharpness and durability for easy wood cutting. High hardness, wear resistance, excellent thermal stability, strength, and toughness WIDE APPLICATIONS: This panel router bit set is truly versatile, offering you added convenience. Suitable for use on a variety of materials and surfaces such as wood, MDF, particleboard, plywood, panels, softwoods, hardwoods, etc. NOTE - Please check the shank size used with your router to avoid ordering the wrong item. FEED SPEED AND SPINDLE SPEED: The feed speed is 8-12M/Min and the spindle speed is 18000-24000RPM. Please choose the correct case size and use low speed. Color: Photo Color Material: Metal Package Contents: 1 set x ROUTER BITS Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be a little different from the real thing. The measurement allowed error is +/- 1-3cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!