is electrically connected to the b terminal of the switch 87 terminals c and f of the switch 87 are electrically connected to the a terminal of the motor 49 while the e and d terminals of switch 87 are electrically connected to the b terminal of the motor 49 the truncated diamond 12 on the base 3 is attached to an arm of a remotely operated device such as the slave manipulator described in the application hereinbefore incorporated by reference and the pins 27 and 59 are inserted in the appropriate tubes t by this device once the pins are inserted in the tubes t the single pole switch 83 is operated to provide electrical contact between the terminal a and c and the momentary switch 87 is operated to provide contact between the terminals a and f and b and d causing the motor 49 to rotate and produce its maximum torque the motor 49 transmits torque to the flange nut 41 through the gears 43 and 51 to pull the nose 33 toward the sleeve portion 37 resulting in the cylindrical portion 29 expanding outwardly to engage the tubes and hold the apparatus 1 therein the arm of the slave manipulator is then removed from the truncated diamond 12 the switch 87 is released and allowed to return to its center off.