Yeah, I bought it them too and had same result. The magnetic part was nice to carry around the set when needed.
That is the drawback of the plastic hansen ones. Great in a draw- suck to carry anywhere. I really wish they would make the hansen ones out of metal, and have a magnet base like the one you posted the pic of. Then it would be perfect imo. I thought about trying to make it, but the size label is so much of what makes that great, and I would have no way to label the size.