I bought 6 packages....gave a few away and have had terrific luck with them...they are a tad thicker and the cut is farther up on the blade ...to me they work great...and have for the ones that I've given away as well. I think they are sharpen than the Olfa blades I've had...I will continue to use them and promote them..gotta save where ya can..sorry about your luck if yours isn't working well...BUT I'd rather throw away a blade that was about a buck than one that was defective that cost me 6 or 8 bucks.