Durable knife blade battery disconnect switch designed to isolate power quickly and safely construction: made of solid brass and copper for conductivity and longlasting performance. Quick power isolation: knife blade style switch that cuts battery power with a simple on/off action. Easy installation: knife blade design enables straightforward mounting and wiring. mount, negative post only: fits post terminals with a 1517 mm cone and is mounted on the negative battery post. Wide system compatibility: suitable for DC 12V to 24V systems. current capability: 250 A continuous current and 750 A crank at DC 12V. Two position operation: on/off switch, designed for vertical mounting. Compatibility and mounting details Negative post mounting only. Do not mount on positive post. Requires a post terminal with a 1517 mm cone/taper for proper fit. Suitable for standard car electrical systems as well as RVs, marine applications, boats and UTVs, as long as the battery negative post meets the 1517 mm cone specification. What makes it stand out Robust materials and corrosion resistant construction provide reliable performance in harsh environments. Knife blade design offers a simple, lowprofile solution that is easy to install and service. current ratings support demanding electrical systems and provide a safe means to disconnect power quickly. Practical use scenarios Recreational vehicles: use to isolate the battery when the RV is stored for extended periods to prevent parasitic drain. Boats and marine vessels: quickly disconnects power during storage or when performing maintenance to protect the battery and electrical system. Cars and UTVs: convenient shutoff during servicing or when the vehicle is unattended for safety and to prevent accidental battery drain.