"No Hex Key?:" 2 F z8 T+ o4 q, K: Z) }' R1 y ; ?! w- A& q" E- V$ L1 B0 v1/2 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 v x- Y4 u* y6 Y, Z# v* `