I took my screwdriver over to my freind Rusty and had him engrave it.
The first picture of him working is with a 50 year old diamond tip engraver. The shaft was to hard to chase with his hand tools. The shaft only has a case hardening. Once he engraved past the hardened part he chased the lettering by hand under the microscope.
The top picture is of the finished part. I must have taken two dozen photos. This is the best that I could do. The bottom part of the letters are hidden because of the radius of the shaft.