"No Hex Key?:" : ]) D% t" b5 |* J+ s1 v 8 x$ X4 z7 ^/ S, k( \* i3 C1/2 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. 0 l9 L% H R2 L% L$ B