Contrary to popular belief, a fine point diamond point is the worst thing you can use to sign your work with.
The diamond on the tip of the point will wear out very quickly and you'll find yourself going through a lot of diamond points needlessly.
The best point shape for signing your glasswork is actually a ball shape. It allows for precise surface contact with the glass and a very large surface of diamond on the spinning head that gives you a much longer life span from the point.
We have several ball shapes to choose from in both electroplated and sinterednpoints.