The MAG-8000 was released in 1999, it is designed to allow you to easily and quickly sharpen a rotary lawn mower blade. The MAG-8000 is the first sharpener of its kind to be able to both sharpen conventional (flat or straight) lawn mower blades AND mulching (curved cutting edge) lawn mower blades. It is also able to easily sharpen both left and right handed blades with a single direction motor. The MAG-8000 is best suited for Servicing Dealers, Landscapers, and large Lawn Care Professionals. People who rely on employees to sharpen their blades will appreciate the full ONE Horsepower continious duty motor - it will stand up to the abuse of employees with little mechanical feeling. Landscapers and Lawn Care Professionals who use WALKER brand mowers will enjoy the open free view when sharpening both right as well as left-handed blades. The MAG-8000 has the ability to sharpen a lawn mower blade in 60 sec -2 min or less.