• High-quality material: tungsten carbide, strong and durable. • Use on various materials: wood, metals, marble, jade, bone, etc. • Dimensions: 3 mm (1/8") shank, 6 mm (1/4") cutting edge. • Double-cut head for efficient carving and time-saving. • Compatible with common rotary tools. • Efficient processing: smooth surface, no dust or contamination. • Operating speed: 6000-50000 revolutions per minute. • Packaging in a plastic box with a separate slot for each piece.