Joins rod frames in the same or different planes. Open throat construction permits rods to be lifted out without having to be pulled through. Setups can remain unchanged when shifting individual members. Accommodates 12.7 mm (1/2″) rod. Rods are locked with 1/4″-20 hex screws. High Strength, Non-ferrous alloy. Corrosion resistant, smooth rounded surfaces are easy to clean.