"No Hex Key?:" 5 p1 V6 n3 s, A3 ?9 R8 v / B3 A. C% }7 {, 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. ! y2 N. D( z+ h6 c3 l 5 H8 D U3 }7 X' `) Z