I have been seeing on here for years now how people love the Harbor Freight replacement blades for their 45mm rotary cutters. We recently had a Harbor Freight open close to me and I was so excited. Since they were only $1.99 for a package of 2 I bought 2 packages. They are the most horrible blades I have ever used. They have "dead spots" in them so you can't make one cut and have to go over a second time to get the remaining fabric. It is not a clean cut it is somewhat jagged. The second unopened package is going back. I will wait until I either have a coupon or they go on sale at Joanne and buy them there.
Pretty much the same experience...I couldn't get one out of the package as it was stuck to the plastic. I use them for household projects now.