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Check the listing for details. 1Set Tester Transistor Diode Capacitance ESR Meter Signal Generator Tool DIY Kit. Condition: New. Listed at 20.28 USD. Automatically detects NPN and PNP transistors, FET, diodes, dual diode, thyristor, SCR, Automatic identification of the transistor pinout. 5 Sizes Combined HSS Center Drill Countersink Bit Lathe Mill Tackle Tool Kit Set.