That's the type of label I'm talking about. I saw this image already, what is the 150? It's showing a curve but it doesn't look like degrees.Maybe a photo, or brand or some other hint would help. It is likely a radius, e.g. https://www.sheartak.com/reversible-carbide-insert-knives-15mm-r150-curved-edges
Oh I see it now. Thanks.150mm radius, hence the R