Cars and guitars go together. Just ask Billy Gibbons.

After graduating college, Trev Wilkinson entered the automotive business, where he worked on all manner of cars, including luxury autos like Aston Martins and Ferraris, during the early ’80s. But it was on a Toyota that Wilkinson would stumble upon the idea that led to his guitar breakthrough.

“I was rebuilding a Toyota rear wheel bearing when I noticed the needle rollers and I thought, ‘if I could put that in a nut, it could allow the strings to go backwards and forwards — and that tinkering is what led to the Roller Nut,” Trev explained.