Ruler positioning block

A ruler positioning block, with 90 ° and 45 ° angles, for rulers from 26mm to 30mm.

Print in PETG, perimeters 4 infill giroid 15%

Threaded insert (https://www.amazon.it/gp/product/B0969ZZKHS/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1)

A bolt M4 x 25   

For konb, I'm used my favorite M4 knob (https://www.printables.com/it/model/200511-knurled-knob-m4-size) Thanks The3Designer

in the photo I use a 26mm ruler