The Nonagrama (Star of nine points) is the symbol drawing SlipKnoT designed it themselves. They did not copied any existing image.

For the nonagrama SlipKnoT is a symbol of unity among them, is the symbol of 9 points - nine people, each point represents a band member. The nine-pointed star can be seen in the costumes of Vol.3 The Subliminal Verses. (The nonagrama is on the right sleeve of his suits). AND NO ONE IS NOT THE NONAGRAMA satanic symbol, it represents Satan or Evil, REPRESENTS THE BATTLE AGAINST THE FALSE WORLD, THE BATTLE OF SLIPKNOT.

A member of the band that has a tattoo of nonagrama Chris Fehn (# 3).

As you know Slipknot is from Des Moines, Iowa and the word "Des Moines" has 9 letters, that says something.

The nonagrama is composed of three equilateral triangles, each rotated 0, 40 degrees and 80 degrees.