Center Finder  Gauge  Template 90  45 Degree Square  Protractor for Dowels Square Stock etc
Free     Thingiverse     SteveJohnsen

Center Finder / Gauge / Template, 90 & 45 Degree Square & Protractor, for Dowels, Square Stock, etc.

This is another version of a center finder tool for end stock dowels boards pipes etc with additional functionality as a 90 degree square and simple 45 degree protractor There are two versions 2mm light weight or 3mm stiffer walls ...

similar models —

Center Finder / Gauge / Template, 90 & 45 Degree Square & Protractor, for Dowels, Square Stock, etc. alternatives
Center finder squareround
MariusHornberger