Primary Function: It is specifically engineered to crimp MC4 male and female solar connector terminals onto photovoltaic wires.Supported Wire Sizes: It works with standard solar cable cross-sections of 2.5 mm2, 4.0 mm2, and 6.0 mm2 (equivalent to 14 to 10 AWG).Mechanism: It features an integrated high-precision ratchet assembly that ensures uniform, industrial-grade compression force and prevents the jaws from releasing before a complete crimp is achieved.Accessories Included: The clear plastic compartment at the bottom contains an interchangeable terminal locator module designed to physically align the pin connectors inside the die during use.