Single carbide wheel replacement head. The TOYO Circle Supercutter features a rubber vacuum cup and scribed alignment demarcations for accurate tool placement. The thrust bearing unit is positioned on a pivoting radius bar which is ruled for precise adjustment. The blade rotates 360⁰ to allow for positive tracking along the path of the circle at any radius. The cutting head has a replaceable wheel and axle as well as an automatic lubrication system activated when pressure is applied to the cutting handle.