Sincereetali Specifications: Material: Bearing Steel Color: Silver + Black Shank Size: 6mm Round Shank Handle Length: 30mm File Length: 25mm Cutting Edge Diameter: 12.7mm Total Length: 55mm Feature: -Rotary burr, good for your wood carving, drilling and engraving, professional tools. Can also grind marble, jade and other non-metallic materials. -Petiolate can basically replace the small wheel, there is no dust pollution. -The grinding efficiency is increased up to 10 times better than hand files and petiolate grinding wheels. -The processing is high-quality and smooth and can be all kinds of high-precision shapes. -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 burrs 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 0-3 mm, which is normal. 3. Due to differences between different displays, the image may not reflect the actual color of the project. Package Included: 6pcs Rotary Burr