3-2 prong adapter is made of fire-proof material PBT that is high temperature-resistant up to 200. With AC 125V/15A and Electrical Rating 1875W Max Wattage, this light socket outlet 3-prong is sturdy enough for working with electrical, household, Industrial, machinery and other appliances. The 2 prong to 3 prong outlet adapter can covert a grounded electric extension power cord to an AC outlet without a grounding pin slot, perfect for older houses or offices with AC wall outlets that can not accept grounded plugs. The 3-prong to 2-prong grounding adapters is polarized and better than the un-polarized plug adapters, because polarized plugs only allow you insert the plug into the outlet slots in one direction, wide blade to wide slot, narrow blade to narrow slot, which ensures neutral-to-neutral, hot-to-hot and provides a measure of safety for the appliances and house wiring to be aligned in terms of polarity. This also explains why most household appliances plugs are polarized. It's small and compact so you can take a 2- to 3-prong adapter in your briefcase or laptop bag anywhere. Just plug the adapter to a wall socket and you will have a 3-prong outlet. This 3 prong to 2 prong adapter is also portable for travelling to Japan. All outlets in Japan is 2-prong, so with this adapter, you can easily charge your 3-prong electronic devices. Converts 3 prong plugs to fit 2 prong ac outlets Ideal for home appliances and electronics UL Certified 15 Amps, 125V, 60Hz, 1875 Watts