Created this remixed model from the “Universal Pegboard System”. The holes are about 22mm apart from each other and are 8mm in diameter. 8mm is more than enough for the round shaft, but the flat head needed more room. I can post the Fusion 360 file if desired for changing measurements. You will need two pegs included in this post.
Printed with transparent PETG
.3mm layers
3 walls
Both pegs and part only consumed 20g of filament.
The author remixed this model.
Utilized the pegs and the 2 peg blank piece to create a specific tool holder.