The file 'Metric Bolt Checker 3D Printer Model' is (STL) file type, size is 367.1KB.
This is a remix, here is the original. I removed the alternating 2mm increments as metric bolts usually stop this after 25mm long. They switch to every 5mm. I also added nut checking cutouts to the back.
Metric_Bolt_Checker.STL | 1.2MB |