This Navigation Toolbar Left 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 4,400 icons, all in the same style and quality.
The navigation toolbar left is a rectangle shape and inside the rectangle it is divided in two sides. On the left side of the rectangle there will be other buttons or selections, which are represented by tiny circles or rectangles.