Purpose and key benefit Four-wire (Kelvin) test leads designed for precise low-resistance and impedance measurements. The four-terminal wiring method separates current and voltage paths so wiring and contact resistances do not influence the measured value. Why you need it Eliminates errors from lead and contact resistance: voltage differences generated by wiring resistance and wire resistance are virtually zero and do not affect voltmeter readings. Preserves accurate current measurement: only an extremely small fraction of current flows through the voltmeter, so contact resistance has no measurable effect on ammeter results. Delivers repeatable, high-precision resistance readings where single-wire methods fail. Key features and attributes Measurement method: Four-wire/Kelvin technique (also called four-terminal or Kelvin measurement) for accurate impedance and resistance testing in electronic circuits. Connector type: Kelvin-style alligator clips (Kelvin fish clips) for reliable dual-contact connections that maintain separate current and sense paths. Durability: Clips are wear-resistant and corrosion-resistant for long life under repeated use. Usability: Clips are easy to connect and disconnect, simplifying setup and speeding test cycles. Performance: Designed to make the voltage difference from lead resistance negligible and to keep voltmeter current so small it can be ignored for practical measurements. Compatibility Intended for use with instruments and setups that support four-terminal measurements: precision ohmmeters, LCR meters, source-measure units, and other bench instruments that require Kelvin connections. Works with components and assemblies where separate current and sense leads are needed to eliminate parasitic errors. Typical applications Precision resistor and shunt testing: Measure low-value resistors and current shunts accurately without lead or contact error. PCB and connector resistance checks: Verify trace, via, and connector contact resistance on assembled boards where small resistances matter. Component production and R&D: Use in laboratory or production test benches for reliable, repeatable impedance measurements during development, QA, or calibration. Practical benefits for users Improves measurement confidence by removing lead and contact contributions from results. Speeds testing with easy-to-use clips while maintaining professional-grade accuracy. Reduces rework and troubleshooting time thanks to reliable low-resistance readings. Notes on use Use the separate current and sense connections as required by four-terminal measurement practice to achieve the described accuracy improvements. Maintain clip contact surfaces clean and free of debris to preserve low contact resistance and long-term reliability.