Usage Tips:Package contains: you will get 8 pieces of stainless steel cleaning brushes with 8 different sizes, all of them have 1/4 inch hex shank, which can be applied on ports, tubes, bearings and other common wire brush applications, enough quantity for your need Quality materials: these bore brushes are made of stainless steel and brass copper, strong and durable, which can clean rust and detail completely; Twisted wire is for increased cleaning action, durable and abrasive Size details: the drill wire brush is 1/4 inch hex shank fits for power drills, impact drivers, die grinders, the overall length is about 4-3/4 inch, and 8 kinds of width includes 8, 9, 10, 11, 13, 15, 17 and 19 mm, so you can choose the suitable size to use according to your needs Multiple functions: this bore cleaning brush can access into narrow holes and confined areas easily, designed for use on right angle grinders, also suitable for cleaning steel parts, machinery, the unfinished metal parts, paint stains, corrosion without damaging surfaces or fine features Suitable occasions: these wire bore brushes can be applied in your car, garage, office and kitchen, nice for cleaning, polishing, painting, or rust removal in automotive, fabrication, machining and smiting applications and more Durable to use:The bore brush set comes with quality wires, which is durable and lasts for a long time without losing out on its functionality, providing more convenience for you. Wide usage:These bore cleaning brushes are designed with the appropriate length as well as the diameter that provides easy access to narrow holes, so they have a wide array of applications. Types: Colour:silver/gold Material:Stainless steel Size: Length: about 11.4cm Width: 8/9/10/11/13/15/17/19mm Package Contents: 1 set x wire brush Warm notes: Pointed parts included, please keep away from little kids. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the