This very useful set is comprised of 22 social icons in vector mask layers on one practical psd. The vector icons are crafted in perfect pixel from 12x12 to 32x32 px.
Those are ideal to use as a base to create custom icons to your liking using effect layers such as drop shadow, gradient overlay, inner shadow… They also come as PNGs if you'd like to use them as is.
You can download psd source files & PNG (free download of course) at :
Royalty free for use in both personal and commercial projects.
No attribution required. For more details visit link above.