This is a replacement clip for a tackle box I purchased. The model can likely be scaled to fit your needs, though I'm not sure if there are any "standard" clip sizes. I modeled the part from the original manufactures piece using a photograph, a digital caliper and Google Sketchup. This may be a good candidate for OpenSCAD but I've yet to learn how to use it.The replacement I printed actually snaps and holds tighter than the clip from the manufacturer!Here's a link to my blog post showing the modeling/printing of the part: http://www.thenewhobbyist.com/2011/06/everyday-fixes-with-makerbot-3-tacklebox-clip/http://www.youtube.com/watch?v=Ss7i8m45KQc