I have a cheap trekking backpack of Czech brand "Husky" which features some pretty frail buckles. Three of them got crushed already so I decided to create replacement buckles.

Actually it'd make much more sense to print out better ones (+ better female counterparts of course) as I already know the original design is not very long-lasting, but I like to experiment a bit and have access to a 3D-scanner, so here's a 3D-scanned replacement.

Also you can see on my pictures that I've printed it in upright position which I do not recommend. Obviously the forces in X/Y make snapping along the layers rather likely... but again this is an experiment. I managed to print this filament in a way that it breaks across the layers so the orientation shouldn't matter. In this case, one advantage of printing it upright is easy support removal.

I've also uploaded a low-poly version in case your slicer struggles with the high polygon count.

edit: There are some bigger buckles on the backpack too. I should have realized that before scanning (for better details because of the bigger object)... However, I now uploaded the resized buckles as well ("big" suffix). I didn't test them yet though. Also there's a new screenshot for a slicing suggestion if you'd like to test Z-strength.