Introducing Plumpicons.

4,400+ icons with thick line width. Buy the entire family for $99 or try the free sample.

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Iconfinder Mixed Blacky Icons shopping website Key key lock lock locked safety icon

Key, key lock, lock, locked, safety icon

key, key lock, lock, locked, safety icon

The PNG format is widely supported and works best with presentations and web design. As it is not a vector format, it's not suitable for enlarging after download or for print usage.

For other, more specific purposes, the icon is also available for download in the following formats:

More icons from the icon set shopping website

10 raster icons

Key, Key lock, Lock, Locked, Safety icons in Glyph style