Suitable material: nylon, resin, acrylonitrile butadiene styrene, acrylic, PVC, MDF wood, hard wood and other three-dimensional carving, surface processing, etc. Chip removal: The router CNC profiler design is the oversized chip of spiral and runout, which prevents the knife from sticking, thus increasing the production yield. Perfect cutting: The profile cutter enables smooth cutting, makes the grains non-sticky, not black, and increase the speed. High quality and durable: These engraving tips have sufficient bending strength and wear resistance for precision engraving of various materials. Enough to replace: Includes 12 cutters Three sizes for durable use. Note: The data is all manually measured, please allow 1-3cm error. Due to differences in light and display, there may be color differences, please refer to the actual item received.