The MAG-1000 is the "standard in the industry" blade balancer. It has been trusted for over 40 years to provide the least cost / highest accuracy balance reading. The MAG-1000 was originated by MAGNA-MATIC in 1958, and has been the standard balancing instrument in the Outdoor Power Equipment Industry. The MAG-1000 is best suited for Servicing Dealers, Landscapers, and Lawn Care Professionals. Anyone who has a rotational object to balance which has a concentric center hole can use the MAG-1000 to balance it. The object must be made of steel so that the magnet can hold the object.