This tool is held in a bench vice and has support bearings for a spindle which is rotated by rolling the hand over its knurled or octagonal body. It is furnished with a range of large and small brass and steel chucks, lanterns and polishing laps. The thread of a screw is first polished by screwing it into and out of a piece of soft wood, charged with oilstone dust and oil. The screwhead is then stoned with Arkansas, and its slit is cleaned with pegweed cut to a chisel shape and charged with oilstone dust and oil. After all traces of the polishing mixture have been removed with soft bread, the screw is mounted in the polishing tool and polished with an iron or bell-metal lap charged with red stuff or diamantine at its head and point. An earlier tool for polishing screws was rotated with the bow.