Knowing that you have an even sharpening of your blade is critical to the longevity of your machine and investment. When sharpening your mower blade you grind the side that needs it the most, then match the other side of the blade. Sometimes just by eye isn't enough. That is when you need a blade balancer. This balancer is mounted on the wall and a magnet holds the blade in place. It will be obvious if you need to take off a little or a lot off until you get an even distribution of blade material. Get the precision you need and less needless vibration on your spindle with this blade balancer.
Oregon Precision Blade Balancer 42-047