This item make it easy to remember what load your tool head is setup for.
This snaps on the powder tube and comes with 2 dry erase boards.
We like to use a sharpie so I don't have to worry about it getting accidentally wiped off. The sharpie comes off with rubbing alcohol. It's also nice writing with sharpie because it's an easy way to remember your loads becuase you can create a "library".