Kewtech FC2000 18th Edition Check Box - Continuity, Insulation, Loop & RCDKewtech FC2000 18th Edition Check Box Continuity, Insulation, Loop & RCD Ensures that you keep your obligation of knowing that your test instruments are reading correctly at all times. Key Benefits: Covers all your 18th Edition testing requirements Checks all leading makes of 18th Edition testers Comes in protective hard case Easy to use Key Features: Insulation, continuity, RCD and loop test function 12 comprehensive test points Null facility for