Package ContentDiameter: 75 mm, 1 red 80 # brush and 1 gray 120 # brush, maximum rpm: 12,500; 5/8-11 wheel thread. Premium MaterialThe drill press nylon filament wheel is made of high density alumina abrasive wire combined with 20-40% filament material. grinding. Bowl designHigh quality nut, bowl-shaped abrasive nylon wire wheel; reinforced brush structure, sturdy and durable, high concentricity. Multiple Choices2 different grits of these abrasive brushes to meet different grinding requirements. (80# suitable for coarse grinding, 120# moderate grinding) Multi-purpose: These nylon wire brushes are widely used for polishing metal parts, removing rust, deburring. Clean, polish and remove oxide coating from metal plates, finish from leather products, wool, etc. Root carving, wood carving, relief and other polishing, surface treatment. Color: red + gray Quantity: 2 pieces