simple gear shape

gear.svg

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">

<svg version="1.1" xmlns="http://www.w3.org/2000/svg"
             xmlns:xlink="http://www.w3.org/1999/xlink"
     width="14" height="14" viewBox="-7 -7 14 14">

<polygon id="cog" points="1,7 -1,7 -2,2 2,2"/>
<use xlink:href="#cog" transform="rotate( 45)"/>
<use xlink:href="#cog" transform="rotate( 90)"/>
<use xlink:href="#cog" transform="rotate(135)"/>
<use xlink:href="#cog" transform="rotate(180)"/>
<use xlink:href="#cog" transform="rotate(225)"/>
<use xlink:href="#cog" transform="rotate(270)"/>
<use xlink:href="#cog" transform="rotate(315)"/>

<path d="M -4.8 0 a 4.8 4.8 0 1 1 0 0.00001 z
         M -2   0 a 2   2   0 1 1 0 0.00001 z" fill-rule="evenodd"/>
</svg>