You can never have enough heavy duty plugs!

I use these inside and outside.  Especially with my multiple devices with those bulky plugs.  This allows me to plug in multiple devices and heavy duty to make sure it provides the correct amount of power.  They are definately heavy duty 3 prong plugs so you can't go wrong with this.  I will use them in the Winter for the Christmas lights.  I will use them to plug in my drill and saw at the same time.  No more having to unplug one and plug the other in over and over again when doing my house projects.  Again this is exactly what the description says it is.  Works perfect!  5 star review!