6-piece assortment of industrial brass coated brushes for deburring and cleaning welding slag, rust and scale Set includes two 1-1/2", one 2", one 2-1/2", and one 3" wire wheel brushes and one 2" wire cup brush 1/4" Hex Shank fits all drills Coarse, crimped wire style for heavy duty tasks Brass coated to reduce sparking