Hitachi gp2s2 straight grinder has a very powerful 520 watt high speed motor and 6mm chuck size giving the operator fast efficient grinding and polishing the gp2s2 straight grinder has an extended front housing making it easy to use and access recessed work plus the external brush caps allow for fast checking or replacement when required other features of this hitachi gp2s2 straight grinder include a conveniently positioned large auto return lock on side switch and maximum wheel diameter of 25mm