Single Circuit ON-OFF with Locking Key - Red300 Amps continuous rating for outboards and small gasoline or diesel engines Tin-plated copper studs for maximum conductivity and corrosion resistance Studs accept 3/8" (M10) ring terminals 7/8" (22 mm) stud length accepts multiple cable terminals Blue Sea Systems one-piece terminal stud design never loosens over time One-piece stainless flange nuts ensure safe and secure connections Isolating cover protects rear contacts Breakout tabs allow wire access in any direction Specifications: Switch Type: Single Circuit ON-OFF Color: Red Maximum Voltage: 48V DC Continuous Rating: 300A Intermittent Rating: 500A Cranking Rating 30 sec: 900A WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Owner&';s Manual (pdf)