It's a gear with black outlines on a white background. There are eight squared points on the gear with two circles on the inside that make a hole for other fittings.
This Engineering icon has Android KitKat style
. If you use the icons for Android apps, we recommend using our latest Material Icons icon pack (please check our sidebar on the right). Otherwise, it's a solid icon pack that looks good in small resolutions, either on the web or in print. It's characterized by thick lines, smooth corners, and is optimized for 24x24 pixels.