DUAL SCREWS WITH CLOSED SCREW DESIGN - GearIT Banana Plug Connectors with Dual Screw Speaker Connector provide optimum signal transfer from speaker wires. Dual screws keep the speaker wire connection strong and secure. EASY TO INSTALL - GearIT Speaker Plug Connector make speaker wire installation easy and is best suited for Speaker Wire, Wall Plate, Home Theater, Audio/Video Receiver, Amplifiers and Sound Systems COLOR CODED GOLD PLATED CONNECTORS - Gold plated speaker plug connector pins resist corrosion for long lasting use. Positive end for red, and white end for negative speaker wire connector. COMPATIBLE WITH SPEAKER WIRE SIZES - Speaker plug accepts speaker cable sizes from 12 AWG, 14 AWG, 16 AWG, 18 AWG, 20 AWG speaker wire. Maximum up to 4mm diameter with jacket. PACKAGE CONTENTS - Each GearIT Speaker Plug pack includes four pairs (4 pairs) pin plug type and four pairs (4 pairs) right angle plug (total 8 pairs, 16 pieces) banana plug connectors made of non-magnetic aluminum shell and magnetic gold-plated brass pins. All GearIT Banana Plugs come with limited lifetime warranty.