The holder is designed for steel tool board with holes every 15mm and a “keyhole” every 3 holes.
The part is attached using 2 M4 screws, one screwed in from the back, one from the front. The back screw can be screwed in before attachment and then inserted into “keyhole”. By changing the screw depth, it is possible to tune attachment tolerance. The front screw is to be screwed in after attachment to secure the hanger in place.
The attached Fusion360 file, although not setup for parametric editing, can be modified to alter fitment or adapt the hanger to one's needs.
The author marked this model as their own original creation.