"No Hex Key?:" [) |( S% c8 C4 X5 n, e! y/ j- l; i : V5 q5 R- |7 ?9 q/ @$ z& r, k9 b1/2 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. ) u: @4 O, u2 R3 G+ z( a% M7 Q! y n/ }1 G: E3 O* w