Convenient kit for safe isolation of electrical installations before work. Supplied in a bag with transparent window to keep the proving unit available at all times. Includes the KT1780 2-pole tester and a Kewprove 3 proving unit which can prove 4 voltage levels. KT1780 indicates 12-690V even when batteries are flat. Also includes universal lock-off for all toggle type switches and warning labels to guard against inadvertent energising of isolated circuits. CAT IV 600V 12-690V Test Voltage 0-400,000Continuity Single-Pole Phase Indicator Phase Rotation Test Indicator Real-Time Read-Out Easy to Read LED Indicators Kewlok Fits All MCBs & Main Switches High Output Proving Unit CAT IV 600V 12-690V Test Voltage 0-400,000Continuity Single-Pole Phase Indicator Phase Rotation Test Indicator Real-Time Read-Out Easy to Read LED Indicators Kewlok Fits All MCBs & Main Switches High Output Proving Unit