Maximm 2 Prong to 3 Prong Outlet Adapter, Polarized Grounding Converter ETL Two Prong to Three prongs Outlets 4 Pack Orange ETL Listed

Not bad for price. Work as described. The only thing negative is that it is very hard to get them to fit plug first time. Almost to snug of a fit but work fine

These little plugs are "heavy duty," and is very well made.

Exactly what it says it does nothing more or less

This feels like an industrial strength product. The only reason for four stars is that the receiving end of the plug is tight with initial use. Probably will loosen with time.

DOES NOT WORK: As many others have noted, your 3 Prong plug will NOT fit. It sticks out halfway, a serious electric hazard.FALSE ADVERTISING: The description on Amazon says it is "ETL Listed" (Electrical Testing Laboratories gives official safety certification). But nowhere on the actual plug does it say ETL as it should. Of course it has NOT been tested, because it would not have passed.