Abrasive combined flap wheels in flexible cloth and abrasive, tested for various applications such as goldsmiths, spectacles, stainless steel, metal polishing, polyester. Many different elements could be changed and give to this wheel many possibility of different areas of use. Measures 4" diameter x 1 1/4" thick. Arbor hole measures 1/4". The higher the number, the finer the grit.