Versatile Rotary Router Bit Set: Ideal for engraving, grinding, deburring, shaping and polishing wood, metal, plastic and more. for DIY projects, wood carving and jewellery making. HSS Tungsten Carbide: Ensures maximum durability, sharpness and heat resistance, providing a long service life and precise machining. Various Router Shapes Sizes: Contains cylindrical, spherical, flameshaped, conical and pointed cutters with cutting head sizes from 4 mm to 8 mm, ideal for detailed carving and efficient material removal. Universal Compatibility: With a 3 mm (1/8') shank diameter, these cutters are compatible with Dremel 4250, Proxxon, Craftsman, Chicago Apollo and most other rotary tools. Use Scenario 1: Fine engraving and detailed relief carving on wood, plastics and soft metals for jewellery, models and DIY projects. Use Scenario 2: Jewelry making and intricate decorative work requiring precise shaping and edge finishing. Use Scenario 3: Deburring, smoothing and shaping after cutting parts for hobby projects or smallbatch crafts.