The Futaba S3003 is a versatile, standard-sized, highly reliable servo that can be easily modified for continuous rotation.
It features plastic gears, making it unsuitable for high-impact applications but an excellent choice for beginners – perfect for moving robotic arms within a specific range or steering a rover.
Please don't expect it to do something like 70mph on a 4x4 off-road RC car, and if they don't work as intended, don't blame them.
It has a 180-degree rotation angle, but it can be modified for full rotation and comes with a range of horns and hardware suitable for most applications!
You can use any servo code, hardware, or library to control these servos, making them great for beginners who want to move without the hassle of feedback and gearbox with motor controller, especially since they'll fit in tight spaces.