Most machinists are familiar with using rods and flatted balls to accurately position a part face against the vise's fixed jaw. While these tools can be somewhat cumbersome, a few modifications can make them significantly more user-friendly.
<span style="font-family: Roboto, Arial, sans-serif; font-size: 14px; white-space-collapse: preserve; background-color: rgba(255, 255, 255, 0.1);">https://youtu.be/iyf94Bo3LuA?si=FtMpbHWjZRQJFEDj
