This handle fits over the power knob on the Graco E20 gen 1 and Gen 2 machines. The power switch Graco part number this fits over is 123967. Everyone who has one of these knows that tiny knob is really hard to turn and if you use channel locks more than likely you will brake the knob. This slides over that knob and with a long handle makes it easy to turn the power on and off. I designed this handle to fit over that knob with a snug fit so it stays on and disperses the pressure of operating the switch over the entire knob so it does not damage the power knob. It truly is a game changer. I designed and 3D print these my self and use it on a regular basis so I know it works and makes it a lot easier on the hands. This is is one of a couple that I printed when testing out the idea.