What You Get: 12 Pieces of Wire Bore Brush in 6 different sizes with 1/4 inch hex for general screwdriver holes. The durable and right amount of quantity of brushes for higher productivity when cleaning and polishingPremium Materials: Stainless steel and brass copper materials make the bore cleaning brushes durable. There is less chance of rusted when cleaning and polishingSize Guide: There are 6 sizes you can choose (8mm/0.31inch - 10mm/0.39inch - 12mm/0.47inch - 15mm/0.59inch - 17mm/0.67inch - 19mm/0.75inch) for your cleaning and polishing requirementsWide Application: The bore cleaning brushes in 6 sizes can reach narrow holes and confined areas . You can choose the brush sizes base on your needs to clean kitchen sink drain, machine holes, paint stains, or fine features without damaging surfacesGentle Reminder: Please do not exceed 600 rpm and do not turn the bore brush counterclockwise. Use it as a gentle manual brush for better polishing results.Colour:Silver & GoldMaterial:Stainless steelSize:8mm,10mm,12mm,15mm,17mm,19mmPackage Contents:12 * Wire Bore BrushOnly 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.