The RKT6V-100K from SR Passives is an extremely small and economical trimmer potentiometer, designed for permanent mounting on printed circuit boards (PCBs). Due to its "horizontal" design, the resistance adjustment is made from the side with a small screwdriver, making it ideal for devices where vertical space is limited. It is linear, meaning the resistance changes uniformly as you turn it, covering a range up to 100kΩ.