The Makita GA4530 115mm Angle Grinder has an ergonomic barrelgrip. Regardless of whether the user grips motor housing or rearcover, the extra-ergonomic barrel grip fits any user’s palmand fingers perfectly and provides easy and comfortable handlingwhile minimizing hand fatigue and pain.Max in steel:6 mmMax in wood:65 mmStrokes per Minute:500-3100 spmStroke Length:18 mm