General description The 20Pcs Stainless Steel Bore Brush Set includes 20 pieces of 8-inch length stainless steel wire brushes designed for effective cleaning in confined areas and narrow holes. The set features various diameters, making it versatile for different cleaning tasks. Technical specifications Length: 8 inches Diameters: 8mm, 10mm, 11mm, 12mm, 13mm, 15mm, 16mm, 17mm, 18mm, 19mm Shank: 1/4 inch hex shank Material: Stainless steel Color: Silver Compatibility and accessories Compatible with electric drills and die grinders (not included) Can be mounted on a matching driver handle for enhanced cleaning efficiency Usage Designed for push-pull operation only Do not rotate counterclockwise Maximum speed: 600 RPM Ideal for cleaning tubes, ports, bearings, and cylinders Other information Package Contents: 20 x wire brushes Measurement error allowed: +/- 1-3 cm Note: Light reflection and different displays may cause slight color variations