Fits onto the positive battery stud providing circuit protection directly from the power source. Ignition protected when used with Sierra MRBF FusesBolt-down design for high-vibration applicationsStandard Isolated M8 stud design allows the stacking of terminalsPrevents accidental shorts with protective, insulating capPerfect in tight spaces to provide high current protectionCompact and designed for DC Main, Bow Thruster, Inverter, and windlass circuit protection300A Maximum AmperageMeets ABYC requirements for DC main circuit protection on large battery banks with high-interrupt ratingEasy fault indication with clear fuse displayColor-coded Amperage Identifier