Astro Pneumatic"s SP0612 Smart Plug 6 Gauge 12" professional booster cable system is the safest and easiest way to jumpstart your car. It features an LED that illuminates when clamps are attached to battery terminals correctly, which protects both you and your cars electrical system. These cables fit all batteries using either top or side post terminals. Use of this cable allows for personal injury protection including the elimination of shocks and sparks that can result when using standard jumper cables. This item features four 400 AMP Heavy Duty Safety Clamps and is made using copper clad aluminum wire. It includes a vinyl zipped storage bag.