I designed this holder to fit tools like edge bevelers and stitching groovers by Oka Craft and KemovanCraft. It's compatible with euro-style sheet metal pegboards that have 4mm holes spaced 12mm apart.
The tool holder is mounted with pegboard / sheet metal screws such as these. The mounting holes have some allowance to allow for slightly different hole spacings. This allows you to mount it for example across multiple pegboards, and should increase your chances of success if the print or pegboard isn't up to spec.
The author marked this model as their own original creation.