Review on POWERTEC 45204 6 Inch Sanding Discs, 40 Grit - Premium Aluminum Oxide 25 Pack by Nathan Guzman

This is the second time I've bought these grinding wheels. The first package contained defective discs. I thought it wouldn't happen again. I ordered a second pack and it was defective again. The picture shows that a huge chunk of the unused disc is missing. I sent an email to Powertec customer service which was useless. Tanya V. said it was from another seller and not Amazon, although I gave the date and order number. Then I sent them a screenshot of the order. She then asked for a photo of the damage which I sent. She then offered no answer or any attempt to resolve the issue. I will not order anymore.