"No Hex Key?:" ; t& V* C! j- U 2 z O/ _5 }7 n1/2 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. 3 T0 F9 w2 ]. Z1 H4 n1 }. z6 J! B$ A4 }2 C$ K) k! G" Y* `8 l