Audio-Technica AT6304 x 2 sets Slight damage to the packaging, but unopened and unused. Audio-Technica Solderless Banana Plug AT6304 (Discontinued) The spring has considerable strength, and the construction is quite solid. These are rare push-type banana plugs. The mechanism involves inserting the plug, then pushing to insert and clamp the cable into the hole. Please ask any questions before purchasing to avoid any issues. No claims and no returns accepted.