I am using one of them now. I purchased a two pack of them on some internet special so they weren't super expensive more than regular ones. I have been giving it hard use and it has not started to skip in any area. No double passes to get the fabric cut. I am really happy with it and it is really sharp. I use a cutter that has an automatic retractable blade for safety. I believe that are made with titanium coating. I also like my titanium sewing machine needles. I have had only a couple break (always my fault) and they stay sharp a long time. I'm happy with these products.