Specifications:Material: bearing steelColor: silver + blackShaft size: 6mm round shankHandle length: 30 mmFile length: 25 mmCutting edge diameter: 12.7 mmTotal length: 55mmFeature:-Rotary burr, good for your wood carving, drilling and engraving, professional tools. Also can grind marble, jade and other non-metal materials. -Petiolate can basically replace the small wheel, there is no dust pollution.-The grinding efficiency is increased up to 10 times better than manual files and petiolate grinding wheels. -The processing is high quality and smooth and can be all kinds of shapes with high precision.-Safe, reliable and convenient to use.-Long service life: more than 200 times the wheel.Uses: Clean burrs and burrs during casting, forging, welding, etc. mechanical boring surfaces.Safety Tips:1. The speed of carbide cutters is generally 6000-40000 rpm when used on pneumatic or electric tools, the tool should be clamped firmly.2. The cutting direction should move from right to left smoothly, do not cut back and forth like using the wheel, be careful not to use too much force (the pressure generally does not exceed 4 kg). Note:1. The product is very sharp, please stay away from children.2. The size is measured manually and there may be an error of 0-3mm, which is normal.3. Due to differences between different displays, the picture may not reflect the actual color of the project.Package included:6pcs rotary cutter