Controls the motor speed to allow reduced spread widths from any 12 volt spreader, infinitely variable speed and spread width without reducing torque. Spread pattern adjusts from as little as 4’ to as large as 25’.

The Earthway 77009 Variable Motor Speed Control features: Fits these spreaders: M20, M21P, M21S, M30, M40, M80 Earthway Number - 77009