5pcs Stainless Steel Steel Wire Fine Cleaning Brush Wire Brush Pen Paint Removal New 5 Piece Pen Shaped Steel Wire Brushes They will fit your hand drill, drill press tools with 3mm collets The elongated shaft allows easy access to hard-to-reach areas and its shape makes it well suited for cleaning flat surfaces and getting into hard-to-reachplaces like crevices For use on items made of brass, copper, gold or other soft ferrous metals, such as tools, doorknobs, auto parts and electrical contacts Remove burrs, rust, dust, remove oxide layer Remove burrs, rust, dust, remove oxide layer.