Probably some of you use quick extrusion profiles like 8020 profiles for tooling design.
I have 2 questions for you.
What size do you think is the most useful or what size you usually use for a specific application?
If you have to choose between 40 mm x 40 mm profiles and 45mm x 45mm profiles for general applications
witch one will you choose?
Since 40mm and 45mm have similar mechanical properties, if you use one or other may be you have a reason why prefer one.
Tank’s for your comments!