The Little Switch is rated at 100 amps continuous service and 500 amps for 10 second surges making it ideal for street rods, classics and passenger cars. In addition to preventing battery drain, this unique switch is also a cost effective anti-theft device. A rubber boot seals the neck from moisture and dirt. Competition approved by IMSA, ARCA, and SCCA. Inexpensive Anti-theft Device Prevents Battery Drain Water Resistant Removable Key