Thin and hard stainless steel needle: The needle is extremely thin and hard, allowing for easy pricking of the cable sheath without splitting it. Wide range of applications: This test extension back piercing needle tip probe kit can be used for auto maintenance, telecommunication testing, construction site testing, and other cable nondestructive testing. Antibreakage soft handles and copper needles: Equipped with antibreakage soft handles and copper needles, these test probes are more sensitive and easier to manipulate during testing, and the durable materials help extend the life of the probes. Compatible with banana and post ties: Designed to be compatible with banana and post ties, these probes provide convenience and versatility for multimeters. Use scenarios: Auto maintenance: Nondestructive access to wires in vehicle harnesses to verify insulation and conductors without cutting. Telecommunication testing: Probe inside cable bundles and protected runs to verify signal paths without damaging insulation. Constructionsite testing: Reach confined spaces to test installed cables with minimal risk of damage.