StreetWires 8-gauge set-screw Power Rings® provide a quick, crimpless installation. Just insert the bare wire end, then use a 4mm Allen wrench (not included) to tighten the heavy-duty, gold-plated locking screw for a strong connection to your amp's power and ground cables.
Set-screw rings are precision machined from high-conductivity brass with an attractive, corrosion-resistant Diamond Plate Nickel plating. You can reuse these durable rings if you upgrade your system or move your components to a different vehicle. Warranty: Lifetime.