The biggest problem with rally pins, though, is that the clips on the backs of them don't always stay put. It's certainly dissappointing to discover that a favorite, irreplacable pin is missing just because the back loosened up too much.

Pin Savers is a simple solution to this problem. Just remove the original pin back, and cut the probe down to about 1/8". Replace it with a Pin Saver collar. Tighten the setscrew with the included allen wrench, and the pin is secured in place - it won't come off unless you take it off.