About the choice of tools: To achieve your requirements, please try to use a tool with a short cutting edge. If the cutting edge is too long or the tool body is too long, it will cause vibration and offset during processing, resulting in tool damage and affecting the processing quality. We recommend that you choose to use a shank Tools with larger diameters. About maintenance: 1. Keep the knives clean, remove resin, sawdust, etc. from the wood after use, and use standard industrial solvents to clean the knives. 2. Apply a small amount of oil on the surface to prevent the surface from rusting. 3. Do not re-sharpen the tool and change the shape of the tool alone, otherwise it will easily cause the cutting edge to break and cause an accident. Notice: (1) the real cutting diameter is smaller than the marked diameter 0.05mm, it is specially designed like this, not caused by error or tolerance. (2) The tolerance is 0.005mm. Description: (1) Type: Single Flute Spiral Solid Carbide End mills; (2) Grade: AAA; (3) Made of: High-quality Micro Grain Tungsten Steel Solid Carbide; (4) Shank Diameter: 3.175/4/5/6/8mm Best Suitable Materials: Acrylic, Compression, MDF, Aluminum could also suitable on below materials: (1) MDF, particle board, board with lagging, log, affixed to the skin panels; (2) Acrylic, PVC, resin, plastic, chipboard, composite board, melamine board; (3) Solid wood, native wood, plywood, lotus plate; Applied to: CNC Router Machining Center, Woodworking Machine, Advertising CNC Router, etc; Features: (1) Excellent combination of upper and lower blades, SHARP cutting edge; (2) High precision grinded and polished, high abrasion resistance and temperature resistance, good rigidity, not easy to break; (3) No burrs for Up and down spiral machining; (4) High performance, improve the work efficiency, reduce cost;