Abstract: A torque indicating device comprising first and second parts connected in torque transmitting relationship,torque transmitting means connecting said first and second parts,torque sensing means, provided on said torque transmitting means and responsive to torque transmitted by said torque transmitting means, to produce a signal dependent on said transmitted torque,communicating means including a transmitter of electro-magnetic radiation receiving said signal produced by said torque sensing means, and communicating an output signal dependent on said torque to receiving means which provides an output responsive to said transmitted torque.