10 pcs double cut head rotary burrs milling cutters set. Fits most small rotary tools. Made of tungsten carbide for high hardness and high abrasion resistance. Shank diameter: 3mm (1/8 inch). Diameter: 6mm (1/4 inch). Total length: 100mm (about 4 inches). Suitable for processing copper, aluminum, alloy, iron, marble, jade, steel, glass, wood, and plaster. Ideal for metalworking, tool making, model engineering, wood carving, jewelry making, welding, chamfering, casting, deburring, and grinding. Processing hardness up to 85 HRC. Material: Steel. Color: Silver. Package includes: 10 x tungsten carbide rotary burrs. The package includes only the items listed above; other products are not included. Note: Due to lighting and display differences, the color in the image may vary slightly from the actual item. Measurement error allowance: +/- 1-3 cm.