Multifunctional probe set includes 2 multimeter test pens and 8 interchangeable needles (4 pieces of 2 mm copper and 4 pieces of 1 mm gold plated) to cover a range of electrical testing tasks. conductivity and durable construction: probes are made with pure copper and nickel plating for reliable conductivity, while PE and PVC materials enhance durability for longterm use. Easy needle swap for different testing scenarios: replaceable needles can be swapped quickly to match the measurement requirement, helping ensure accurate results. Broad compatibility: 4 mm female socket compatibility allows use with most multimeters and testing devices, making these probes a versatile addition to professional and hobbyist toolkits. Practical applications: Electronics workbench: perform voltage measurements, continuity checks, and PCB testing in tight or awkward spaces. Automotive diagnostics: probe sensors and wiring harnesses in vehicles where access is limited. Field service and prototyping: quick fault finding and testing onsite or during circuit development with different needle sizes.