Seymour Duncan Liberator Potentiometer 250KPickup swapping system that enables you to change pickups without a soldering iron. Replaces a standard 250K volume pot. With a Liberator installed in place of a volume pot, changing pickups becomes fast, easy, and solder free, AND just as reliable. In fact, its more reliable than a less than perfect solder joint. You simply insert the bare end of each pickup lead into one of Liberators pickup connector stations and tighten the screw clamp to lock it