"No Hex Key?:" % y5 R7 E; D# ]3 G4 A: n ) r9 |' j9 Y5 R1/2 3/8 1/4 inch rod couplings can be used in a pinch if you need a hex key or allen wrench. insert rod coupling into hex opening in lug set screw and turn with wrench. . A3 ?6 V, @' m8 w. h3 E" M* d) s