These are made really cheaply - but, they work just fine...for a while (for me- about 2-3 trips abroad *they are plastic afterall...) , then they break. But, what can you expect for less than $*/each? For that price they are disposable and I highly reccomend them because for roughly the same price of 1 at a retail storefront (same quality) you get 5. I have used these with no problems in Brazil/ Netherlands/ Philippines / Singapore/ Indonesia / Italy/ Iceland/ UK/ Germany and I have had foreign visitors use them here in the USA (their overseas plug fit in this product & the US plug ends pop out so they can use their laptops/cell chargers, etc, etc, etc while visitng the USA). Well worth the $ if you plan on traveling abroad or have overseas visitors.