Superior Tool 18934 3/4-Inch Power Tube Cleaning Brush Power tube cleaning brush Ideal for projects requiring a number of soldered or brazed fittings Can be used with regular key chucks, chuck adapters and keyless chucks 1/4 inch hex shank Ideal for projects requiring a number of soldered or brazed fittings Can be used with regular key chucks, chuck adapters and keyless chucks Power tube cleaning brush for 3/4 tubing 1/4 hex shank