This digital caliper holder stays securely attached to your pegboard thanks to two hooks which hold the bottom and prevent the holder from flipping up when you remove it. These hooks flex into the bottom pegboard holes. To insert or remove them without damaging your pegboard, I recommend using a screwdriver to flex the plastic hook.
Because of the need to flex the hooks it's best to print in a semi-flexible filament (I believe I used ABS, but it's been a while). The print is in two parts (left & right) in order improve the strength and flexibility of the hooks and to avoid overhangs. Simply glue or weld the parts together.
This design is sized to a standard pegboard with a 1" spacing between holes, and to calipers sold by Harbor Freight, but should work for calipers as well.
The author hasn't provided the model origin yet.