Rotary wire brush set ideal for cleaning prior to welding. Brushes removes paint, rust and are suitable for general metal preparation. Shank Diameter: 6mm Max Speed: 4,500RPM Gauge: 0.3mm Brushes made from brass coated steel wire to protect against corrosion and provide a durable finish. Set Includes: 1 x 50mm/2" Flat Wheel Brush 1 x 50mm/2" Cup Brush 1 x 25mm/1" End Brush