Drop Rod With Hammer On Flange. 1/4-20 threaded rod mounted to a hammer on clamp for a horizontal flange This is a great way to run support cable runs through bar joists. Hammer on to the top flange and your pathr will runt throuth the center of the truss. Use to suspend a j-hook with bat wing or angle bracket for cable runs. Other applications include lighting, temporary power, elecrical boxes and more. The drop rod system will make any application that you need to suspend from 1/4" rod faster and easier. Available in 12", 24" & 36" lenghts.