I currently own several Cricuts. I have been using the machines since they first came out and way back in the old days, getting new blades was so expensive and sometimes hard to even find! Amazon and the internet makes it so much easier - and less expensive- than ever before. This is the second or third time I have purchased these blades and I have never had any problems with them- they work beautifully and cut like magic. I have used them to cut paper, vinyl, HTV, vellum, cardstock, felt, craft foam, and faux leather. I am able to use the same blade for about a month- and that is with cutting projects daily. This is the best deal you could hope to find and keep finding!