PNG SVG MORE
Signs & symbols
Glyph
Miscellany Web icons
padlock, security, protect
Black
371x512
PNG ICO ICNS SVG MORE
Mixed
Free Misc Icon Set 2
Lock, privacy, off
512x512
Entypo
padlock
421x512
PNG ICO ICNS MORE
Arrows
DefaultIcon ver 0.11
Closed, padlock
256x256
open, Unlocked, padlock
Business & finance
Wireframe mono icons
padlock, open, Unlocked
48x48
Closed, Fixed, Lock