Description: Ideal for contour work, weld grinding, deburring, rust or paint removel, and feathering, Extra Long-lasting Ceramic Grain for fast, cool cuts, Durable overlapping fiberglass plates for flexibility. Material: Premium Ceramic Grain; Diameter: 4-1/2"; Arbor: 7/8"; Grit: 40; Type: 27; Max. Speed: 13,300 R.P.M. Include: 10pcs Warning: always take care and keep away from children. always wear eye protection in work area.