in certain embodiments there may be a plurality of apertures 470 formed along an arm 456 a and along an arm 456 b this may enable the pintle ring 454 to be fixed at a variety of lengths 454 from the static portion 452 in operation an operator may disengage the lock 464 such that the extension 450 is free to move with respect to the static portion 452 the operator may extend the extension 450 to the pintle hitch 56 and secure the pintle ring 54 thereto the operator may then activate the lock 164 the lock 164 may then automatically engage fixing the position of the extension 450 with respect to the static portion 452 as the operator backs the truck 12 toward the trailer 18 referring to fig2 a 25 c a lock 464 may have an actuator 471 for engaging and disengaging the lock 464 in certain embodiments the actuator 471 may move the lock 464 from the state shown in fig2 a to the state shown in fig2 c in certain embodiments the actuator 471 may be embodied as a pneumatic piston 472 and cylinder 474 alternatively the actuator 471 may be embodied as a hydraulic piston 472 and cylinder 474 electric actuator 474 or the like in certain embodiments the lock 464 may.