Spiral-Sewn Cotton Buffing Wheel shines-up steel, stainless and aluminum Dependable, well-balanced, long-wearing wheel is for coarse buffing and cutting on all materials, particularly steel, stainless and aluminum. Made from selected white cotton material with continuous spiral sewing with 3/8\" spacing. Medium cutting action 40 ply buff wheel Best used with Tripoli or Stainless Compound Diameter: 10 inches Arbor hole size: 3/4\" - 7/8\" Wheel Thickness: 1/2 inch Motor size: 1/2 - 1-1/2 HP