What you get? The two-piece replacement set uses 11 inches, 4 X 15 rows of steel wire with 6 inches of bristle coverage for a area of force and more concentrated stain removal when in use, 6PCS bore brushes comes with a total of 8 pieces, Includes 1inch, 3/4inch, 1/2inch sizes. Wire brushes have super strong and sturdy stainless steel wire brush, heavy-duty stainless steel wire brushes, silver wire material, bristles up to 1 inch in length, firmly embedded bristles in the holes, not easy to pull out, to reduce breakage and extend the service life. The handle is injection molded with a smooth, burr-free . If you are install a lot of air conditioning units and this is a fantastic way to clean the inside of the copper line set. If you're a plumber or an technician, bore brush for drill is a must-have set of brushes, they effectively remove rust, scale, and debris from inside the pipes, improving the and preventing potential blockages.For extremely tight or awkward angles, the rigidity of the brushes can be a limitation. It can help you clean rust off your trailer hitch receiver prior to repaintingthese welder's brushes to clean your grill top before washing. The brush wire is very heavy, other applications include removing paint, rust, slag, solder, scale, machining surfaces, cleaning threads, grills or tiles. Ultra wide range of applications, if you have to shift the brush around inside the pipe in order to contact the entire inside . I have hand brushes for this same purpose, suitable for pipe soldering preparation, automotive cleaning, fabrication and machining., Manufacturer: Akfldms