14PCS of 1/4 Inch Hex Shank, Brass Wire Pipe Brushes for Electric Drills, Suitable for Pipe Cleaning, can be Used for Internal Pipe polishing and deburring.

This is an excellent range of diameters of non-ferrous rotary brushes...great for when I have a rugged cleaning job, but need to preserve the substrate metal from wear or damage by the bristles.These are very similar to bore cleaning brushes, in terms of the spiral bristle configuration, but designed with 1/4" hex steel quick-connect drill shanks.

I do use round metallic brushes a lot in my line of work to clear pipes, metal tubes and fittings threads from all sort of debris, gunk and residue from pipe dope and Teflon tape.This set is good because the brushes handles are not the typical twisted bare wire but rather ¼ hex chuck which makes them readily available to attach to a drill and benefit from its speedy rotating motion.The quality leaves a lot to be desired, so think of them as basically disposable brushes that will quickly wear out. The good thing is the set contains 14 of them, so they may last you longer depending on usage.They appear to come in 5 different sizes with the biggest about an inch in diameter.