[Multi Specifications]You get 10 pcs different sizes of twisted wire stainless steel bore brushes with 4-inch in length.Diameters are 8mm,10mm,11mm,12mm,13mm,15mm,16mm,17mm,18mm and 19mm.Each brush has 1/4 inch hex shank to be mounted on any power drill or die grinder (not included) [Portable & Easy to use]The 1/4inch hex shank of these wire bore brushes is definitely easier to use than those screw type shanks. You can mount the brushes on a power drill or die grinder,or on a corresponding driver handle for more efficient cleaning [Professional Design]The wire cleaning brush is practical and designed for easy access into confined areas and narrow holes,which can be applied for tubes,ports,bearings,cylinders or other narrow areas that require cleaning [Wide Application]You can keep wire bore brushes in your,car,garage,kitchen and office.The bore brushes are suitable for cleaning,polishing,painting or rust removal in automotive,fabrication,machining,smiting and other applications. [Wire Brush Tips]Please note that these wire bore brushes are for push-pull operation only.Don't turn counterclockwise and exceed 600 rpm when using the power drill or die grinder. Pay attention to the correct use of these brushes, in order to prolong the service life, Weight: 0.43320834483 Pounds, Manufacturer: Jaywool