"No Hex Key?:" 5 v; Q- P( Y; |' }1 Z 2 K6 ^* ^' x. c* T9 t3 e2 w1/2 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. 6 ]6 y9 }3 b) {" @, G0 o % P, O7 j, m% d- S' u