cleaning brush: Various specifications: There are 6 different sizes of twisted wire stainless steel hole brushes, including diameters of 8mm, 10mm, 12mm, 15mm, 17mm, and 19mm; Each brush has a 4-inch long/4-inch hexagonal head and is installed on any electric drill or grinder (not included) Wire brush: Stainless steel material: The cleaning wire brush is made of stainless steel material, which is wear-resistant and not easy to rust, and can provide you with long-term service! Steel brush for drilling: Our drilling cleaning brush is made of stainless steel and can effectively clean rust and small areas. Pipeline cleaner: Thin stainless steel brush wire can enter narrow holes and areas, and can also be used with power tools to achieve high cleanliness and deburring. Packaging Information: We have provided you with 6 hexagonal handle steel brushes of different sizes, which are sufficient to meet your needs Colour:As Shown Material:Metal Size:8mm, 10mm, 12mm, 15mm, 17mm, and 19mm Package Contents: 12 * Pipe Brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.