Product Description：

Feature:
 
Designed for both round and square battery lugs.
Quickly isolates the vehicle's battery, allowing clock, radio, etc... to remain functional when used with a fused bypass.
To isolate the starter circuit only, unscrew teh knob; however, it is not necessary to remove the knob entirely.
Rated 500 amps surge and 125 amps continuous at 12 volts.
Compact size fits most battery compartments.
Continue rate 125A
Crank rate 500A
Voltgae 12-24V
Diameter 12.5mm/Negative
Cable size 4-6AWG
Knob color Red,Green, Black