Battery Isolator Master Cutoff Switch, 300 AmpCondition:* New Stock, In OEM Bulk Packaging. As Pictured.Additional Notes:* Single Circuit Battery Master Switch* 2 Position Switch – On/Off (S.P.S.T)* Simply turn the key 90 degrees and remove to isolate and secure the electrical system* Disconnects the battery safely, to eliminate any power drain from the battery while your vehicle is stored* Battery cut off switch not only helps extend the life of your battery, but also aids in preventing theft.* UV stabilised black plastic housing – Built to last in marine conditions* Easy to install – Simply connect the switch inline to your positive (+) battery cable* 2 Terminal Studs: 3/8″ With Nuts.* 2 Mounting Screw Holes: 3/16″ (Does Not Include Mounting Screws).* Detachable Key For Anti-Theft* Ideal for RV, Marine, Racecar, Winch Power, Industrial Equipment, etc.* Maximum Load (10 Seconds): 12 Volt 300 Amp* Maximum Continuous Rating: 12 Volt ~ 30 Amp* Overall Base Diameter: ~ 2.22″* Overall Length: ~ 2.5″ (Without Key)* Overall Length: ~ 3.5″ (With Key)UNKRP10462