Wrist Strap, Cable and Plug System Grounding Tester. This wrist strap, cable and plug system tester checks wrist straps, grounding wires, grounding plugs and the contact resistance between the wrist strap and skin quickly and simply. Ideal for beginners and professionals. This is a very simple and effective test. Use this system tester before handling any electronic components to check your wrist strap, cables and plug are all connected correctly and that there are no faults or breaks. This system tester is ideal for anyone interested in PC repairs, maintenance, upgrading, cleaning, from the one off job to the field engineer on the move and for the bench operator that needs to check their earthing cabling before starting any work. In the second photo, the grounding plug wrist strap and 10ft cable is not included in this sale, this shows how the set up is ready for testing. Contents: 1 x Grounding system test unit 1 x Cabling system 3m Set of instructions.