Amprobe TL1500 Test Leads Test lead set connects a compatible electrical test meter to a device for testing Set includes two 48 lead wires, two standard probe tips, two alligator clips, and two spade lugs Silicone insulation on lead wires protects hands from shock and heat, resists melting or becoming brittle in hot or cold environments, and maintains flexibility better than PVC insulation 3.15" alligator clips have 0.30" jaw opening and teeth that grip the conductor to provide a more secure, hands-free connection than probe tips Meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for category IV installations up to 1,000V