SharpBrows Golden Ratio Tool
This measuring tool is used to measure the exact correct shape of the brow. The width between its levers is based on a historical golden ratio division: 1,61803... This simply means that parts of the line that is divided in two have ideal lengths if the length of the line divided by the length of longer part equals the division of the longer part and the shorter part. The only way to achieve that proportion is if the shorter part (b) is 0.382 and the longer part (a) 0.618 parts of one whole.
Made of special flexible metal.