The Innovative Products of America 7-Way Round Tractor Trailer Terminal Chaser Brush removes corrosion from 7-way round (J560) tractor trailer cable and socket connections with a single push-and-pull motion. Its brush arrangement aligns with connector pins for precision cleaning, while the ergonomic ABS handle with a rubber overmold provides a secure grip. The brush is designed to clean both male and female trailer plugs and socket connections.