I've spent £100s on tough system tool boxes, I can live with the continuous breaking and replacing of the yellow clips but all of my main metal clips on the front have now snapped their plastic holders on my wheeled boxes. I have 1 that is not on wheels which seems to be next generation, all metal clip system and it hasn't broken. No replacement metal clip option, I guess its because of the way I would have to doctor the box to make it fit. Shame for a £100 toolbox.