To maintain shot string patterns, shotgun ports must be clean and free of any wad buildup. The Dewey Shotgun Port Cleaner has a large plastic handle that helps the cleaning process. Each tool comes with three brushes, 1/8 diameter, 1-1/2 in length and made of tough and durable stainless steel bristles. This tool also works well when trying to clean any difficult to reach space in a firearm.