After wiring a new pickup into my Dean Edge 09 bass, I noticed the sound would cut in and out with the slightest wire movement. I thought I had made a mistake, but thought it was odd that it happened when a potentiometer tab moved. Never heard of these breaking like that before but bought one of these to test it.Wow this is so much better than the cheap quality that came with my bass. Size is perfect (measure yours first to know for sure though) and the action isn't really loose like my other one. These are a good size and suitable for either volume or tone applications (typically 500k is for hum buckers though, fyi...if you have a single-coil pickup consider the 250k).In case you didn't know..."A" knobs are not a linear 1:1 increase as you turn. A linear graph sounds off to most people, which is why the curve is logarithmic instead. "B" knobs are linear and sometimes used for tone. Honestly it probably doesn't matter one way or another, but if you slap a couple of "A" knobs in your instrument you'll be fine.Note: this doesn't come with a resistor like some packs do (it makes the "tone" sound). Make sure to find one elsewhere if you need one.