If you shoot aluminum arrows and use threaded points, you've no doubt discovered that after a while, the points like to unscrew themselves from the shaft. Not only can points become lost, but they also make noise during flight.
Here's an easy fix for loose points:
Rub a little bowstring wax onto the threads of the points. When you screw the points back into the shafts, the wax fills the gaps in the threads and keeps them from vibrating back out.