Audio taper pot that's seriously harder to turn than a standard CTS control. Maybe this one would be useful if you like to keep your tone or volume control from moving around on stage? Standard sized .25" split splined aluminum shaft for USA Fender push on control knobs. I tried a brand new Fender USA Strat knob on the pot and it fit exactly. Brand New. Real EVH Part 0220836000, UPC 717669943806.