Electrical tools set with a copper probe for reliable electrical diagnostics Copper probe construction for good conductivity, corrosion resistance, and durable, accurate measurements in electrical system tools. 12 volt test light: compact, powerful yet small and light, penlike in hand for precise control and comfortable use in automotive testing. Test light automotive: versatile tool for testing continuity, testing voltage polarity, checking lights and motors, identifying short circuits, and detecting bad contacts in 12volt systems. Fuse tester automotive kit: widely used to test voltage polarity, test continuity, check lamps and electric motors, and to follow and locate short circuits with a light tester. Key benefits and attributes Function: provides essential electrical testing and troubleshooting capabilities for automotive systems. Compatibility: designed for 12volt automotive applications and related electrical components. Size and comfort: compact, penlike form factors for easy handling and prolonged use. Material and durability: copper probe offers reliable conductivity and corrosion resistance; built for durable performance. Performance: enables accurate measurements and dependable diagnostics in everyday maintenance and . Use scenarios Vehicle lighting and fuse inspection: quickly test fuses, verify lamp operation, check polarity, and confirm continuity in lighting circuits. Wiring and component diagnostics: assess continuity and polarity across wiring harnesses, check motors and electrical components, and identify bad contacts during repairs. Shortcircuit tracing and fault localization: use the fuse tester and test light to locate short circuits and follow fault paths in automotive electrical systems.