300A rating disconnect key provides instant power cutoff to protect marine, automotive, or caravan electrical systems. Effectively stops battery depletion during storage while delivering sturdy performance for current applications 300A continuous / 1000A intermittent at 12 48V DC features configurable function All aluminum corrosion proof casing with a chrome exterior ensures decades of handy service. The weather tolerant design makes it indispensable for outdoor power setups, urgent systems, and vehicular applications. Provides secure current interruption with uncompromising durability Full component package includes must have components for effortless installation: battery disconnect key, faceplate, 2 protective rubber terminal insulators, along with 2 conductivity 3/8 inch copper lugs and 2 industrial strength heat shrink tubes. Complete solution for secure battery cutoff system installation Use scenarios Marine applications: isolate the battery when the boat is stored to prevent parasitic drain and protect electrical systems from corrosion and accidental startup Automotive or caravan use: quickly disconnect the battery for maintenance or extended storage to prevent battery depletion and reduce risk of electrical faults Outdoor and emergency power setups: reliable current interruption in weather exposed environments, ensuring safe and rapid isolation when needed