45 degree saw guide
thingiverse
I saw similar made of wood, but i found it easy simply to print. You need to add 4 magnets 20x3 mm into these holes and cork them. You can use it to cut positive and negative corner too.
Download Model from thingiverse
With this file you will be able to print 45 degree saw guide with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on 45 degree saw guide.