The 2631 is a Test Lead with BNC (female) to Minigator test clip for test versatility. BNC connector is molded directly to the wire for pull strength durability and dust and moisture resistance. BNC center contact is made of beryllium copper with gold plated finish for corrosion resistance, low contact resistance and long insertion life. Black wire is connected to BNC shell, red wire to BNC center contact. Minigator clips attach to terminals up to 0.187-inch (4.75mm) diameter.