Wrench tool set for PV4 photovoltaic connectors. The PV4, also known by the brand name MC4 (Multi Contact), are the standard connectors for photovoltaic systems. A set is based on two wrench tools and you use it to tighten or loosen the PV4 cable gland. In the middle part of the first wrench tool you put the PV4 connector. Use the second wrench tool for easy tighten or loosen of the PV4 cable gland. If you want to unlock the Snap-in locking of two PV4 connectors, you can use the forks that are attached to the wrench tool. You can use the wrench tool set for PV4 plugs and PV4 jacks, both are compatible. · Compatible with: PV4 connectors, 1000 V Version & 1500 V Version · Material: plastic · Color: blue, black CAUTION ! never work on cables or connectors which are under load.