Sharpening lawnmower blades is no longer complicated with the new RBG 712 Blade Grinder. In fact, it has never been easier. Now you can restore your blades to a factory flat edge using our preset blade guide to maintain the proper angle for the best cut and edge life. By replacing traditional grinding wheel. The RBG 712 will reduce your work time while eliminating grinding wheel dust and wheel dressing. Our unique design will allow you to grind any length of cutting edge required for both standard (right-hand) and reverse (left-hand) blades. Product Does not include Grit Collector