What can you do with it? Engraving knife, specially designed for detailed carving, milling, and engraving with a Dremel multifunction tool. How is it used? Suitable for all Dremel multifunction tools or other multifunction tools with a shank size of 3.2 mm. For better control and more precision, use with the Dremel precision handle. Suitable for use on the following materials: wood and wood-based materials, metal, plastic, leather, acrylic glass, fiberboard, rubber, carbon fiber materials, particle board, laminate, foam boards. Recommended speed: wood 20,000 - 30,000 RPM, metal 15,000 - 20,000 RPM, plastic 15,000 - 20,000 RPM.