When I needed to add some grommets to a vinyl banner I wasn't sure which to choose: a hammer or a crimping tool. I chose this one because it's cheap and I think it was the right choice, it worked very well. I repeat the thoughts that the cutting tool/bit is useless. It is not sharp and will not cut through without a firm hammer blow. Cutting the X through the banner with a precision knife helped. Then the other tools worked fine. It would be better if the cutting attachment removed the piece, that would make it easier to attach the grommets, but that's not a problem, you can still get a good professional grommet.