Professional tool for commercial or occasional use Perfect for cleaning, deburring, edge blending By varying the pressure you apply you can get just the right amount of abrasion without damaging the paint M14 thread suitable for most 4-1/2" and 9" Grinders with an M14 thread This listing is for 1 brush 0.3mm coated steel wires 65mm diameter With them not being twisted wire brushes, it means not as much rust and paint will come off giving you a bit more control as not so abrasive