So these HiLetgo potentiometers are exactly what you need for electronics projects and repairs! You get 20 pieces of WH148 B5K single-joint potentiometers, which is a great quantity for prototyping or having spares on hand. They're 5K ohm variable resistors with a 15mm actuator length and 3 pins for easy circuit board mounting. The linear diversity of resistance means they provide smooth, consistent adjustment across their range, which is perfect for volume controls, brightness adjustments, speed controls, or any application where you need variable resistance. The single-joint design is straightforward and reliable, without complicated multi-stage mechanisms. They're compatible with standard PCB layouts and breadboards, making them versatile for both permanent installations and temporary prototypes. Whether you're building audio equipment, custom controllers, robotics, or repairing existing electronics, these potentiometers deliver consistent performance at an affordable price. The 20-piece pack means you can experiment freely without worrying about wasting components, and they're quality enough for both hobby projects and more serious electronic work. It's one of those basic electronic components that every maker should have in their parts bin!