The HiKOKI GP2S2L Die Grinder has a very powerful 520W high-speed motor and 6mm chuck size giving the operator fast efficient grinding and polishing. An extended front housing makes it easy-to-use and access recessed work, plus the external brush caps allow for fast checking or replacement when required. Other features include a conveniently positioned, large auto return lock-on side switch and maximum wheel diameter of 25mm. Specification: Input Power: 520WNo Load Speed: 25,000/min.Max. Wheel Diameter: 25mmChuck Size: 6mmWeight: 1.8kg