"No Hex Key?:" k5 p% K2 Y9 o; w# J9 X3 A % z% E! O% `# S. [ z2 A5 B4 F1/2 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. $ D9 T; V8 w" H2 P, M& x. W