The 584-0500 is a 4mm red standard In-line Banana Plug with a stainless steel contact spring. The large rear diameter of this plug will accept cables with a conductor of up 5.5mm (10AWG). The lead wire can be held either by soldering in a large solder bucket or by a set screw. When the cable is held by the set screw, the solder bucket can also be crimped for added strength. Gold-plated reduces contact resistance.