Mounting key set for MC4 / PV4 solar plugs. Two compact, durable mounting keys designed to tighten and loosen MC4 and PV4 connectors quickly and reliably. Robust construction delivers stable performance and long service life, while the compact ergonomic shape makes handling and storage easy for frequent use. Key benefits Efficient installation and maintenance: speeds up tightening and loosening of MC4 and PV4 solar plugs, reducing installation time and installer fatigue. Compatibility: specifically designed for MC4 and PV4 solar connectors for a secure fit during assembly and disassembly. Durable construction: quality material and solid design provide stability and longterm reliability even under intensive use. Compact and ergonomic: small, lightweight keys are easy to hold, transport, and operate in confined spaces. Handy twopiece kit: includes two mounting keys to support multiple connectors or to keep a spare on hand. Typical applications Rooftop solar array installation: quickly secure PV connectors across module strings during system installs. System maintenance and troubleshooting: loosen connectors to isolate or components during or inspection. Portable and offgrid systems: assemble and disassemble plug connections on mobile solar kits, generators, and field setups. Who should use it Professional solar technicians and installers looking for reliable, repeatable connector handling. DIY solar hobbyists and home installers who want a practical tool for safe and efficient PV connector work.