"No Hex Key?:" 0 j& Q$ T% ^9 b; X+ G6 ]9 A8 T ! `- @, R; w, V3 n9 E h" V( z1/2 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. 1 q$ [$ h( |3 i