Feature: 1. Small and portable, easy to install and use. 2. Made of fine quality ABS material, ergonomic design, has a long service life. 3. Mainly used for grinding iron drills to improve usage rate of drills. 4. Push the plastic cover to the left or right to replace the grinding wheel. 5. ❤ Small and portable, easy to install and use. 6. ❤ Made of fine quality ABS material, ergonomic design, has a long service life. 7. ❤ Mainly used for grinding iron drills to improve usage rate of drills. 8. ❤ Push the plastic cover to the left or right to replace the grinding wheel. Specification: Made of fine quality material, practical, easy to install and use, wide application range, has a long service life. Features: Small and portable, easy to install and use. Made of fine quality ABS material, ergonomic design, has a long service life. Mainly used for grinding iron drills to improve usage rate of drills. Push the plastic cover to the left or right to replace the grinding wheel. Specifications: Main material: ABS Color: blue Grinding wheel diameter: 25mm / 1.0in Grinding wheel thickness: 26mm / 1.0in No-load speed: 1500-3000rpm Axial diameter: 6mm / 0.2in Scope of application: 2-12.5mm iron twist drill (2.0mm-5.0mm, 5.0mm-8.0mm, 8.0mm-12.5mm) Item size: 185 * 40 * 32mm / 7.3 * 1.6 * 1.3in Item weight: 82g / 2.9ounce Package size: 190 * 78 * 42mm / 7.5 * 3.1 * 1.7in Package weight: 117g / 4.1ounce Note: This product is only for normal iron straight shank twist drill. It needs to be used together with electric drill. Package list: 1 * Grinder 1 * Wrench Package List: 1 * Grinder 1 * Wrench