Assemble the pen. Your pen kit should include instructions for which pen components attach to which blanks. Use a pen assembly press or a simple bench vise to press on each metal component. Once all parts are firmly pressed on, your pen is complete. Here's a typical process for a twisting pen:[24] •Press the pen cap into the upper brass tube.
•Press the twisting mechanism into the lower tube. Before you press, lay the mechanism next to the blank, and twist to extend the tip. Note how far you'll have to press it in order for the tip to just barely protrude.
•Press the pen clip and cap onto the upper blank.