The first thing that came to mind was "used to stretch fabric, and temporarily secure it until a permanent attachment is applied."
The striking surface (if you can call it that) is at a 45 degree angle to the penetration axis of the sharp end... You smack it and it tightens whatever you're attaching at the same time it's tacking it down. After using these to temporarily secure stuff all the way around, then you staple (glue, whatever) the fabric in place more permanently, and then remove the temporary attachments.
Into the fires of forever, we will fly through the heavens, With the power of the universe we stand strong together
Through the forcing of power, we will soon reach the hour, For victory we ride, Fury of the Storm!