1. 10 pieces mini woodworking rotary file Shaft diameter: 3 mm; Shaft length: 40 mm; 10 pieces set of M2 highspeed steel (HSS) metal cutting burrs, including the ball shape, cylinder shape, round shape, pointed shape, cone shape, oval shape and flame shape, which meet your different needs. 2. : rotary burr set made of highspeed steel (HSS) and coated titanium for long life, good wear resistance, durability, faster cutting and work efficiency. Save time and money. 3. work efficiency: when using this rotary burr set with a rotary tool, the machining efficiency is ten times higher than manual file tool. The rotary burr set can be done from the small grinding wheel with the handle, creating less dust or dirt. 4. Multifunction handmade tools: 10 different carving cutter pieces of the most commonly used types to meet different woodworking situations, each burr is shaped to fit different angles or situations. Suitable for carving, engraving, drilling, chamfering, grooving, grating, shaping, hollowing.