MIT 30-PC. WIRE WHEEL and CUP ASSORTMENT features: Industrial Quality Crimped Steel Wire, Hardened and Tempered, Galvanized Steel Housing, 1/4" Steel Shank Fits all Power Drills, Removes Rust, Paint, Scale, Dirt, etc. Prepares Metal Surfaces for Painting, Welding and Soldering, 2"-Wire Cup Brushes (Coarse and Fine), 1-1/2" Wire Wheel Brushes (Coarse and Fine), 2" Wire Wheel Brushes (Coarse and Fine), 2-1/2" Wire Wheel Brushes (Coarse and Fine), 3" Wire Wheel Brushes(Coarse and Fine)