"No Hex Key?:" # D* X( Q. v9 A( _9 x3 X3 q# q ! O, o: o1 u8 ~: s1/2 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. $ n2 E( }9 ]% ]/ R