Oregon 109179 Saw Chain Hydraulically Assisted Bench Grinder/Sharpener Includes a template for: depth-gauge setting, and wheel contour Eliminates manual locking and unlocking of the vise as each cutter is sharpened The grinder comes with three grinding wheel with the thickness of 1/4-Inch, 1/8-Inch, and 3/16-Inch Includes a wheel-dressing brick 12 month warranty for defects in material and workmanship