Heavy Duty!!!
I love these magnets! They're a perfect thickness to not bend and warp. I wish they were just a tad bigger, or offered another size that is larger than these, but for the most part they perfect to hold my die sets. It's great that they come with the storage folders too. You can store your coordinating stamp sets in them with your dies, if your stencils are small enough they could potentially fit in there too. All in all I love them and continue to purchase them.