Both of the standard arms—lead holder and metal tip—can be bent inward on a hinge that's about halfway up the arms.

The attachment affixes securely and accommodates both fine-tip and standard-tip Sharpies, as well as your personal favorite mechanical pencil or pen

I love its capacity to attach a different tip, like a marker, a regular pencil, etc.

Both arms of the compass have the same connector screws, so you could use the pen/paintbrush holder in place of the metal tip, instead of in place of the lead tip.