"No Hex Key?:" 2 Z6 ~, M0 u8 O- k / d, B# ^/ ~% R* q$ |2 R+ H1/2 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. , \4 ^9 L9 q( ~# q, ` / J" I; z& Z: j& X% F- A; l- u