Product Description. Stainless Steel Bore Brushes with Handle: Color: Silver Materials: Stainless Steel Brush Diameter: 8 mm, 10 mm, 12 mm, 15 mm, 17 mm and 19 mm Length: 4 inch 't turn counterclockwise or 600 rpm.meant for , pull motion and clockwise use only. You could mount the brushes with hex shanks on a corresponding driver handle, power drill or die grinder. Widely used for dusting, rusting, decaying and polishing tubes, ports and bearings, allowing you to clean your kitchen, car or machinery thoroughly. Also suitable for cleaning,polishing,painting or rust removal in automotive,,machining,smiting and other applications. The wire increases cleaning action. Each brush is fitted with a 1/4 Inch hex shaft for use with a standard 1/4 inch driver handle. Cleaning Brushes: Color: black brush Length: . 4.33 inches/ 110 mm Diameter:3 mm,4 mm, 5 mm, 6 mm, 7 mm. : 5 pieces These cleaning needles and brushes are useful to clean small orifices such as -, nozzles, air tools, camping , and so on. Cleaning needles: Feature: stainless steel wire winding; And wire winding size: 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm Color: silver Length: . 4.33 inches/ 110 mm : 10 pieces Package Contents: 6 x Stainless Steel Bore Brushes with Handle 5 x Cleaning Brush with Key ring 10 x Cleaning Needle Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.