Servos

The servo is a mobile socket. Any tool that can be equipped on a socket can be equipped on a servo.
Servos ride on servo rail. They move along this rail in a particular direction, and its socket can point perpendicular to the direction of motion.
Servos need charge to run.
They are controlled by instructions.
They can be colored.
In addition to the socket part, servos can hold a single stack of items.

Workbench.name

Servo