Within the downloaded file there is the full set of icons in .png format as well as a flat JPEG and full .PSD file which is similar to the image above.
The icons are free to download and use wherever you like, a simple comment below showing where you have used them will suffice as a thanks. It would also be great to see how/where you have used them.
If you liked this post, you may want to download my 1080px Photoshop grid. It’s all setup and ready to go with 18 columns.