It depends on which trigger you have activited. When you turn the allen screw all the way down, it locks that trigger. If I wanted to use it as a pinky trigger, I tighten the allen/set screw on the thumb trigger all the way in and then loosen the pinky trigger allen screw. It is now a pinky release. If you tighten the pinky trigger allen screw down and back out the one on the thumb trigger. It is now a thumb release and the pinky trigger will not activate the release.

Play with it.