What does the scale measure?

The Iris has a metric scale to measure a circle's diameter. It will measure any circle between 3-70mm in diameter. 

 

What is Iris made of?
Iris is made of solid machined brass and carefully selected stainless spring steel. The packaging is made of card and is 100% recyclable. 

 

How resistant is Iris?
Iris is designed to last a lifetime and the brass will patina with time and use. The leaves are stainless steel and are resistant to corrosion.