Jewelers Rubber Polishing Wheels -9pcs - Fits Dremel Tool Two green rubber knife edge polishing wheels with mandrel- 3/16" x .85" Two red rubber knife edge polishing wheels with mandrel- 3/16" x .85" Two rubber polishing wheels with mandrel- 1.1" x .89" and 1.4" x .89" Mandrels are 1/8" (3 mm) shank - set of three To reduce scratches and polish metals; can be used with a Dremel tool