Amprobe DL248D Deluxe Test Lead Kit Test lead kit connects a compatible electrical test meter to a device for testing Kit includes two 48 lead wires, two standard probe tips, two alligator clips, two spring-loaded clips, two spade lugs, and one red tip-length extender for connecting to a variety of conductors 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 2.25" 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 Electro technical Commission (IEC) safety standard 61010 and is certified for category III installations up to 1,000V (alligator clips are certified for category II installations up to 300V)