Let me count the ways :)
To nestle the razor with the jaws slightly open when I file the old pins off..
the same use as I take a 1/16 punch to pop the pins
to hold the new scales together while the rubber cement dries
to hold the scales after cutting and initial sanding to sand the contours in..
to hold the 1/16 rod when I cut them off for pins
to hold the 1/16 rod when I file off the cut end for pins
to hold the 1/16 rod when I do the initial peening on one side for pins
to use as the anvil to peen in the pins (drill a few sizes of divots in the top)
To straighten out bent tangs see some of the DA threads
to hold a razor for mod'n the curves
to hold a razor to fix a heel
to hold a razor to fix a toe
those are just off the top of my head :)