Bought 2 of the 42" high fences to make an outdoor enclosure for our cats. Stacked them to make 84" high and put wire over top. Worked well for our needs -- super heavy duty ground stakes were a real plus. Clips are a little flimsy -- two were bent upon arrival but easily straightened -- of course, one just as easily bent again but so far the other is holding up well. 
Wire was a little lighter than some we looked at locally but then the price was a better than local prices so, for cats, we're happy with them and would do it again.