The Large Sphere Machine makes spheres ranging from 1-1/4" to 9" in size. The downward slant of the shafts run the sphere in a bath of grit, eliminating the need to constsntly dab grit on with a brush, and causing the grit slurry to run away from the bearings. The angle of the cutting cups can be increased as the rough corners of the sphere grind off. Both heads are spring loaded, so continuous adjustment is unnecessary. This unit comes complete with two (2) 8" x 1/4" x 1" spiral polishing buffs, two (2) grit pans, instructions, product guarantee, and choice of one pair (2) of cutter cups. *Please state cup size when ordering.