John Petrucci

"John wants the neck as flat as possible. What I do is I use the little StewMac String Action Gauge. I set the action on the guitars, I start at 40-thousands of an inch off the twelfth fret. So from the top of the twelfth fret to the bottom of the low string is 40 thousands and then adjust to the radius from there. It's very specific, we kind of equate it to a Formula One race car driver, and the guitar and the amp, rig and everything is the car and I'm the mechanic. If I don't set the car up right, he's not going to feel quite right. I'm doing truss rod adjustments sometimes right up until I hand him the guitar. We used to do it sometimes while he was playing but we try to get away from that now. So it's all kind of nit-picky stuff, but the end result is that he's able to out here and play two hours the way he does," says John Petrucci's guitar tech.

John Petrucci uses his signature Jim Dunlop picks as can be found on Petrucci's official website.

As shown on his official website, John Petrucci uses these DiMarzio Black Clip Locks.

This Pick was developed in collaboration with legendary shredmeister John Petrucci, this pick is designed to complement his huge sound and the intricate passages he's famous for playing. It projects volume and depth thanks to Ultex®, and its uniform bevel allows John to move from string to string with ease. Available in 2.0mm.

In this music video, John Petrucci can be seen using the Fret Wrap during his lead solos.

In this video, Petrucci demos and discusses his signature Dunlop Trinity picks.

In this December 28, 2016 Twitter post by Jim Dunlop U.S.A. Petrucci is shown holding one of his Red signature Jazz IIIs, the post reads:

"Signature John Petrucci NYC Primetone Jazz III. @jpetimages photo by @sweeneysphotography… http://ift.tt/2is80Is"

We can see JP wearing his signature strap in this Instagram photo.