This is a clip that mounts to peg board. Designed to fit 1/4 inch holes spaced on 1 inch centers. The pegboard was bought at Lowes if you want to get the same stuff.

I modeled it using freecad. The source file is attached if you want to edit it.

Here is a full collection of my pegboard stuff:
http://www.thingiverse.com/thing:1486547