This is a precision chain saw grinder giving accurate sharpening of each chain saw tooth, every tooth will be the same ... , 50Hz motor as power source, grinds almost any chain type and size, including common 1/4" 325 ... drilled holes for bench mounting, an adjustable chain stop, twist-fast chain clamping, depth adjuster, an on/off switch ... easily adjusted up to 35 Electric Chain Saw Sharpener FY-220S 220W