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The Draper 4 Piece Petrol H.T. Tester Set provides quick and reliable testing of high tension systems in petrol engines. This diagnostic tool set features four individual testers, each equipped with a flash tube that indicates the presence of HT voltage, making it straightforward to identify ignition faults across multiple cylinders. Designed for versatility, this HT tester set is compatible with all petrol cylinder types and allows for both individual cylinder testing and multiple cylinder diagnostics. This capability makes it particularly useful for systematically isolating ignition problems in four-cylinder engines, helping mechanics and vehicle technicians diagnose misfires and spark-related issues efficiently. The flash tube indication system provides instant visual feedback, eliminating guesswork when checking spark plug leads and ignition coils. Note that these testers are not suitable for use with deep recessed spark plugs, so compatibility should be verified before use on certain engine configurations. Features and Benefits: • Flash tube indication provides instant visual confirmation of HT voltage presence • Four-piece set enables simultaneous testing across multiple cylinders • Compatible with all standard petrol cylinder types for broad application • Suitable for both individual and multiple cylinder fault finding Contents: 1 x H.T. Tester Set (4 Piece)