This is a set of 5 different sized center finder/scribe guides.
Each size is for a progressively larger sized stock.
1-1/4", 1-3/4", 2-1/4", 3-1/4", 4-1/4"
To use guides, place over stock and twist so posts on each end ride against edge. Use a pencil to mark through the center hole. Move guide along stock with pencil to draw a line.
Disclaimer: The 3D printer file is a publicly available file and we encourage everyone to print their own tools and accessories when possible. We offer this as a service for those who do not have a 3D printer and the cost of the item is for the time and materials to print the file.