This is an updated review and I'm dropping a star from the rating. We used these for two months in Portugal and they developed a problem after a while. The bottom outlet stopped holding the plugs in place and the plugs would fall out. We could make it work by flipping the adapter over, but the plugs are still very loose in the adapter outlet and it is not ideal. The front outlet was and is fine. This happened on all of the 3 of the 4 adapters we had with us. It is still a good product, but your mileage may vary if you use these heavily.**** Original review ****I bought these for our trip to Spain (type E/F) and they fit the outlets perfectly. The best feature is the second two-prong outlet underneath it, so you can power more than one device at a time. The fit snugly and there is no issue at all.These are a good value and the three pack is essential if you need to plug in more than two electrical devices at a time.