Feature: 1. HIGH END PROCESS ELECTROPLATING: Electroplating can protect plug body from external oxygen corrosion, 24K gold plating, good contact and wear resistance. 2. STABLE PERFORMACNE: The locking banana connectors have excellent sound performance, crystal clear transmission characteristics, elegant surface treatment. 3. APPLICATION: Suitable for speaker wire, AV receiver, amplifier, surround sound, banana wallboard. Suitable for DIY your music equipment, and also fit for audiophiles. 4. WIRING WAYS: The locking banana plug has double screw lock, no welding connection; self locking design; lock gun type. Simple operation, install and play. 5. PREMIUM MATERIAL AND DIAMETER: High quality brass material, durable, corrosion resistant. Rear hole diameter: can accommodate up to 7mm of speaker internal cable. Specification: Item Type: Banana Plug Material: Brass Model: BA1403 Process: 24K Gold Plating Unit: 4 (2 Red + 2 Black) Fit Hole Diameter: 7mm/0.3in Product Wiring: Welding Free Assembly Convenient, Practical Tools Screw Scope of Application: Professional Speaker Accessories. Package List: 4 x Banana Plug (2 Red 2 Black)1 x Hex Screwdriver