Blind Hold Down Clips
I needed replacement clips for the blinds in the house so designed and printed instead of buying. These were printed out of PETG
I'd recommend also printing in PETG or another tough material
These are plenty strong for my application in the current orientation but can be orientated with the large face with two holes as the base and enable supports to increase the strength within the layers.
Holes are 11.30 mm apart and are 4.20 mm in diameter
Pin is 2.90 mm in diameter and 5.20 mm tall