This is a Mr.Rivet Marking w/0.25/0.45/0.65mm Model Craft G Tools Creos for modelling

Mr. Rivet Marking is a tool for reproducing the appearance of rivets in aircraft and tank models.
The tip part rotates when the main body is pushed down, so without pressing it hard you can make sharp and even â—‹ shaped rivet heads.
3 kinds of tip tool are furnished and they can be easily interchanged with a wrench.
Various scale kits can be handled with this tool alone.
*Tip tools come in different lengths, so they can be identified easily.

 

Main body, φ0.25mm tip tool, φ0.45mm tip tool, φ0.60mm tip tool, L shaped wrench