"No Hex Key?:" + ^& F3 B. Y, G6 @ # x% }5 y5 e; T5 f5 W1/2 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. ?9 t# r0 D2 o1 g8 \# }$ g$ B# M; @1 H* G9 A9 r. ` F# o