"No Hex Key?:" * e! N3 B' b6 m8 f# Z 3 F/ I, }: J" w2 X/ j0 l1/2 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. 2 m9 k' h9 c( ^! [6 F I2 Q+ T/ S- V0 J: Y# n( Z