Now you can clean any excess glue from inside your pen/pencil, letter opener, rollerball. At the same time, the Barrel Trimmer will square up the end of the wood blank. By leaving the blank slightly long (1/32"), it can then be trimmed square and back to the brass tube. By having square ends the project fit together better, and will make the blank run better on the mandrel. The Barrel Trimmer can be chucked in a drill or glued into a wooden handle you make.