I believe the pictures say it all.. the weak flimsy handle that came on my toolbox broke so I printed a nice strong ABS replacement. The STL I posted has a 5mm shell as I wanted to reduce the amount of filament used but did not want to simply lower the fill as it would have lessened the amount of plastic in some of the more structurally strained areas. That said.. this thing is solid. It took quite a bit of work with a pry bar to spread the ends out far enough to fit the toolbox.