I bought this to add grommets to the folded, hemmed edge of the poly fabric patio shade. The punch is designed in such a way that the eyelets make the actual cut when they are pressed against each other. It works very well on lighter materials, but it doesn't break through the two-ply edge of the shading fabric, making it unusable for my project. It seems very strong and holds up well, but I couldn't pre-stab it because the tool itself isn't sharp enough to cut anything.