Abstract: The invention provides an "on the fly" adjustable clutch for use with robot end-of-arm tooling that provides a means for sensing movement of a tool attached to the clutch and can send a signal to shut down the robot when an overload is encountered. The clutch includes a piston capable of lateral movement within a chamber that is slidably mounted on a pin and a tool plate. The pin extends beyond the clutch housing, and the tool plate is pivotally mounted on the pin. Biasing means acts to bias the piston away from the tool plate such that the tool plate is held somewhat rigidly in relation to the clutch housing by the biasing means. In a preferred embodiment, the biasing means includes springs and pressurized air that may be introduced into the piston chamber on either side of the piston to increase or decrease the bias of the springs. Thus, the clutch is capable of varying sensitivities with the biasing means being adjustable under program control.