Idea of Safe Icon
There is a safe shape with a square and a circle in the center of it. The outer square has another smaller square towards the outside. The circle also has a smaller circle within it. There are dashes on the outside of the larger circle. The outer square has two small rectangles on each side.
This Safe icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.