Can I use the DLLs included in the nuget package

I used Nuget package explorer to pack some third party DLLs into one package and published to my nuget server, many of my projects need refer to those third party DLLs and I don't want to add DLL references over and over again. With nuget I only need to install one package.But after installing that package, i can see those DLLs in the packages folder, but I cannot use classes in those DLLs.Is that possible to use classes in the DLLs of that nuget package?