This is the tool used to easily install the Sting Stopper Vibration Dampening Inserts. Manufactured specifically for Sting Stopper Insert installation. The tool has the perfect (12°) angled tip to "pull" the insert into the shaft (by pushing on the tool). Designed so that the insert doesn't tear and so that the tool is able to be easily removed from the shaft without pulling the insert out with it. See the installation video for a quick demonstration.