Here is the link for Harbor Freight Customer Service.
PLEASE write to them and tell them about your problem with blades.
they do have a return or refund policy.
http://www.harborfreight.com/contact-customer-service

Many complaints on this board and I am wondering why no one seems to want to allow the company to make things right . After months of complaints I am wondering why no one has returned the blades or asked for replacements or refunds. It is not going to cost a small fortune to return the blades, and I would think you can take them back to the store. I want to hear from someone who has returned the blades and what response you get from H.F.

I did a search and we have been discussing these blades for over a year. with all the complaints, one has to wonder if there are enough sour grapes to make a big batch of WHINE! The blades sure have been well stomped!