The 4 PK CMC (LA-750) Dual Rated Solderless Connectors are designed for secure and reliable wire connections in electrical systems. These connectors accommodate wire ranges from 750 AWG to 1/0, offering versatility for various conductor sizes. The dual-rated feature allows compatibility with both copper and aluminum wires, making them ideal for diverse applications. To use, strip the wire ends and insert them into the connector, then tighten the screws for a solderless, strong connection. In brand new, never-used condition, these connectors are perfect for creating efficient, long-lasting electrical connections.