The alligator clips are made of high-quality copper material with strong electrical conductivity. The insulating sheath ensures a comfortable fit and protects you. Rated current: 50A. The metal alligator clips have properties such as rust-proof, corrosion-resistant, oxidation-resistant, and long service life. The end of each alligator clip can be connected to the cable by welding. The red and black sheath can help you identify positive and negative charges. The high-quality metal spring can withstand greater pressure, which has strong biting force and does not fall off after clamping. Maximum opening: 25 mm. Widely used in various electrical projects, voltage testers, car and truck batteries. They can be used to replace household battery chargers and others such as solar panels, electric fences, caravans, boats, lawnmowers, etc. Package includes: 3 pcs red metal alligator clips + 3 pcs black metal alligator clips.