DESC: Additional wheels required to sharpen 1/4-Inch, .325-Inch, and mini 3/8-Inch pitch chains Comes with one grinding wheel, 3/16-Inch thickness for sharpening .325-Inch pitch and standard 3/8-Inch pitch (72/73/75 series) chains Includes a wheel-dressing brick and a template for: depth-gauge setting, and wheel contour Runs on standard 115-volt power 12 month warranty for defects in material and workmanship, Manufacturer: Oregon