Electrical Crimping Tool: Includes 1 crimping tool, 2 blue wrenches, 12 pairs of male/female solar connectors, 12 pairs of metal contacts, and a portable storage bag. Ideal crimping tool for beginners and professionals alike. High-Quality Materials: Made of high-carbon steel, the crimping tool is wear-resistant and impact-resistant, offering a high degree of protection. The ergonomic PP and TPR handles provide a comfortable grip and reduce hand fatigue after prolonged use. Precision Components: The solar connectors are made of PPO, a material offering excellent insulation, UV resistance, and flame retardancy. They are equipped with an IP68 sealing gasket, effectively protecting against water, dust, and corrosion. Easy to Use: The MC4 crimping tool securely crimps wire lugs; the metal contacts grip the wires, and the male and female connectors fit the cables. The wrench allows for loosening and tightening the connectors, making it extremely convenient to use. Wide Applications: MC4