Magna-Matic Corporation 8100 Blade SharpenerThe MAG 8100 Commercial Lawn Mower Blade Sharpener is the lowest cost commercial option in the industry. This unit is made in the USA and will dial in to a consistent 30 degree cutting edge angle. Unlike other sharpeners you can easily maintain that 30 degree cutting edge angle without any complicated adjustment or time consuming tools. The single crank stays where you adjust it and you simply lower the wheel until it almost touches the worktable and