Professional double Piece tool : This resetable fuses tester set includes 3A specific fuses and 5A breaker, ideal for 24V / and 125/250V applications in HVAC diagnostics. circuit protect fuses Tester : Functions as a diagnostic tool to detect overloads, undervoltage, and short circuits with auto reset capability after tripping for easy troubleshooting. general HVAC Compatibility : Works with all systems and equipment using standard 3A/5A fuses, making it essential for residential/commercial/industrial electrical testing. strong alligators Clip Connectors : Features 14 tinned copper wires with PVC insulation, 44.5cm length, and spring loaded erosion resistant clips for secure connection. Versatile Diagnostic Applications : Perfect for labs, workshops, and industrial settings with insulated cables ensuring safe circuit prototyping and fault detection.