A free spinning ball device giving support to the cutting head of a string trimmer, while maintaining a plane which is parallel and vertical to the surface being cut. The lower end housing is open to allow the primary ball to maintain constant contact with the ground while unit is in operation. The upper end housing is closed with an end designed to mate with both flat and curved heads which are most commonly found on string trimmers. The upper housing has a grooved wall around the upper interior circumference to retain smaller balls, which are in continual contact with the main spinning ball during operation. The upper and lower housings are attached to each other using an integrated lock which can be turned either clockwise or counter-clockwise to match the rotation of all string trimmers.
