Hakko FG470-02 - Wrist Strap and Grounding Wire TesterThe Hakko FG-470 functions exactly like the 498, but it sports a fresh, new look. It quickly and simply checks for wrist straps and grounding wires, and the contact resistance between the wrist strap and the skin. This wrist strap tester can be used anywhere to quickly and easily check wrist strap performance. Furthermore, the FG-470, which uses the 9V battery, ensures employee safety and eliminates product defects caused by static electricity.