What you get You will receive 4 pieces of wire piercing probes in 2 sizes, providing enough quantity for daily use and replacement needs. Universal sizes Insulation piercing clips offer 2 different jack sizes: 2 mm (0.08 in) and 4 mm (0.16 in). Choose the size that matches your actual needs. material Probes are made of PA and nickelplated copper, delivering strength, durability, and reliability. Designed to resist breakage and damage over time. Wire protection No need to cut or strip insulation. The probes can contact insulated wires while testing, helping protect the wire insulation and the wires themselves. Key benefits Nondestructive testing of insulated wires without removing insulation. Durable construction with nickelplated copper for long life. Twosize compatibility covers common wire testing scenarios. Includes enough pieces to use and as needed. Specifications and compatibility Contents: 4 wire piercing probes in 2 sizes Sizes: 2 mm (0.08 in) and 4 mm (0.16 in) Use scenarios Automotive electrical diagnostics: probe insulated wiring bundles in harnesses without stripping insulation. Electronics troubleshooting: test insulated power and signal leads in devices without disassembly. Appliance and harness inspection: quickly check circuits and wiring routes in home appliances and equipment.