Caliper Jaw for square (L-Ruler)

I use a flat square approx 8" x 12" (outside), mini version of large carpenter square that are common. I needed to measure something that my digital calipers couldn't reach so I made this add-on jaw that fits on my square. Amazon link: https://www.amazon.com/Mr-Carpenter-Square-Framing-Carpenters/dp/B086R74VLK - it appears several there are several sellers with the same product if you search for “L ruler”.

The long side of my square is 1.5" or about 38.5mm, use the Fusion 360 CAD file to adjust, the user parameter SquareBaseArmWidth should be used. The JawLength parameter will adjust the depth it can measure, I regret not making mine match the short side of the square which is 6 11/16" or 170mm, maybe I'll reprint some day.

I printed with PETG, in tests I found that PLA was a bit to stiff for the spring to work well. It was quite hard to get on the first time but after sliding it back and forth a few times is slides with just the right amount of friction. If you need to tune in the sliding with a bit of heat on the spring.

You can read the back of the square also which is metric, but iff you primarily use metric you can print a mirror image for left handed/metric more visible.

I printed solid but a bit of extra infill will probably work too, no support of course.