This Hoteche Brand brush is perfect for surface preparation such as deburring, polishing, and removing scale, rust, corrosion, weld scale and splatter, and paint on large surface areas. Descriptions: 5/8"-11 arbor will fit most 4" to 4-1/2" Angle Grinder; Max RPM: 11,500; Cup Dia.: 3in.(75mm); Wire Dia.: 0.5mm Powder coat finish; Hardened steel wire securely fastened in a safety design-cup; Each pc packed in a color box; Include: 10pcs. Always wear eye protection; and keep away from children.