Bicycle chain wear gauge

A tool to measure bike chain wear; modeled after Shimano TL-CN42.

Why are most commercial tools measuring the wrong thing: http://pardo.net/bike/pic/fail-004/000.html

Print Settings

Infill:

100%

Filament:

Notes:

Due to flexure this has to be printed with springy material like PETG or ABS - PLA is likely going to fail.