High Efficiency: The extremely sharp three-sided arc surface flute type can discharge chips from the hole from all sides quickly and leave a smooth finished surface without damaging the wood. For wood carving, they are excellent tools. Steel Material: The wood carving drill bits are made of high-quality high-speed steel, extremely strong and sharp, long service life, anti-corrosion, heat-resistant, sturdy and durable. Size Details: Compatible with most rotary tools with a 0.3cm chuck. Engraving Head Diameter: 3mm, 4mm, 5mm, 6mm, 8mm. 5 different sizes of carving heads to meet your different needs. Widely Uses: These wood carving bits are mainly used for wood carving details, such as bird feathers, fish scales, deep grooves, curved patterns, and lines, to meet your carving needs. Package Contents: You will receive 5 different sizes of rotary tools and wood carving tools, which are highly recommended for DIY, hobby, woodworking, styling, and more.