Uses silicon carbide which is a sharper, more aggressive abrasive that leaves a fine/brighter scratch pattern. Open mesh construction for light to moderate pressure on low speed. Efficient and cost-effective. Can be used dry or with water or oil to decrease the heat and improve the finish. Wound around a core and must always be run in the direction of the arrow printed on the side of the wheel. Durable, aluminum reducing bushings are available to accommodate most arbor sizes.