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1/2 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. C7 L0 T9 d1 T0 I8 K D0 |& c6 Z7 \# A7 f7 e8 ~' Y* [7 ?0 ]$ Q8 t