The ground wire and snap are used to connect mats with an ESD rating of electrically conductive to a building ground.
The general recommendation for a continuous run of ESD matting is for grounding at 10-foot intervals with each separate mat grounded no more than five feet from either end.
Manufacturer – M + A Matting
Product Number – 9911 (Ground Wire), 9911-2 (Ground Wire Snap), 923 (Heel Grounder)