This is a great gift for friends. I put different logos for different group of friends. There are two versions. 8.5mm is good for phones without case and 10mm is for phones with case.

There is no special use for the hole at the bottom. Just for stacking up multiple ones when I carry them.

Unlike other multi-angle stands, there is no 0 degree angle as I never put my phone like that.

Creality

Ender 3 Pro

No

No

0.12mm height, 0.4mm width

10%

4 layers bottomed, 7 layers top, 0.28mm initial layer height, 12g of filament, 3 hours print time.