https://www.jimdunlop.com/john-petrucci-trinity-pick/
Take charge of your technique with the JP Trinity Pick. We started with the Jazz III’s size for its lightning fast maneuverability, and we added the shoulder contours of the Flow Pick for their excellent handling. For even greater control, we broadened the back end of the pick to create a small triangle—perfect for choking up nice and tight. The resulting pick offers an entirely new playing experience that’s smoother, faster, and more disciplined than ever.
“This pick has helped me reach new levels of speed and accuracy,” John says. “The quick-release edges allow me to execute difficult, complex licks with ease, and the three-sided shape provides superior handling. The rigid Ultex® material makes for an incredibly smooth attack and a noticeably fuller and sweeter tone.”