"No Hex Key?:" ' q6 ?2 D; W1 g2 ]1 c9 F% Q+ ? 0 F" z4 s( T: d% [0 ^+ y! i1/2 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. & x( O# W; d8 Z' H8 q