20pcs Carbide Spinning Burr Set with 20 different bit shapes for engraving, drilling, polishing, cutting, and deburring. Includes 10 burs with 3mm head diameter (38mm length) and 10 burs with 6mm head diameter (43 to 50mm length). 1/8 inch (3mm) shank fits most rotary tools with a three-jaw chuck for precise centering. Features a multi-cut design with intersecting cutting edges for efficient material removal and a smoother finish. Made from high-quality tungsten carbide steel with a hardness of up to HRA90, offering superior sharpness, strength, and durability—significantly longer lasting than high-speed steel. Suitable for use on wood, plastic, aluminum, mild steel, stainless steel, brass, copper, bronze, marble, slate, wax, and balsa. Ideal for DIY woodworking, carving, engraving, polishing, and precision deburring. Package includes 20 carbide burrs. Color: Silver. Note: Slight color variation may occur due to lighting and display differences. Measurement tolerance: +/- 1-3cm.