Cardboard is not a strong material.

I bought two of these cases to carry my quadcopters and transmitters along with a couple batteries. The handles broke off on both cases when I tried to pick them up off the floor. I wasn't swinging them around or carrying excessive weight. The weak point is that the handles are riveted into cardboard sides, cardboard! I never noticed that they were riveted to such a weak material. The frame of the cases use thin aluminum to hold its shape but the rest is basically thick paper(cardboard). There are better cases for the same or similar price. If you want something that will last don't buy these but if you want a case that looks good then buy one. I will always opt for better quality over looks.

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