Drill Bit Stop Gauge

This is a drill bit stop gauge modeled after a metal one available from Lee Valley/Veritas. Used with a collar to set drill bit depth.

UPDATE:
I created a new design based on the original where I embedded the gauge into a block. This makes it a lot easier to hold in your hand when setting the stop.

I also discovered a fault in my original file, so I uploaded a revised version (v4) with more prominent rule markings.