End-of-Arm-Tooling (EOAT), sometimes also called "End Effectors" are fixtures attached to the end of Robot arms that interact with workpieces or systems
One main constraint of this type of robotic fixturing is Payload - the weight capacity of a robot arm which includes anything and everything attached to the robot arm
Payload capacity can easily be taken up by fixturing, adapters, cables/hoses/wires for transfer of power, as well as the weight of the workpiece(s) themselves
Able to be programmed & controlled via the robot (sensors & actuators, digital/analog inputs/outputs)
Robots not necessarily able to easily do what humans can do (ex: twisting a screwdriver, picking up something soft/flexible)
Custom vs. modular fixturing