1、[Sturdy Construction] Spade plug is made of pure copper, which is corrosion resistant and copper plated surface to prevent oxidation, providing stable signal and sound quality for your sound components. 2、[Easy To Install] Speaker wire Y plugs are easy to install. Unscrew the screws with hex wrench, twist the wire harness, insert the wires into the plug, tighten the 2 screws, and put them in the heat shrink, no soldering required. 3、[Wide Range Of Applications] Y spade connectors are ideal for use with AV receivers, amplifiers and surround sound systems and are compatible with wire diameters up to 4mm. Can be welded or screwed. 4、[Dual Screws Lock] Spade plugs are a perfect replacement for banana plugs, the double screw locking ensures that the speaker wire is firmly fixed and will not loosen over time, making the connection more durable. 5、[Premium Performance] Y spade plugs provide secure, positive contact with binding posts. Wider base minimizes short circuits for maximum signal transmission. Can be used after installation.