Hello Matthew, thank you for sharing this important feedback with us about your 45 pound plates. Sharp burrs on the plates are not what you should expect when you order plates with us, and it sounds like you might have a refund or exchange due to you with our Quality Guarantees.
Please send us an email with a photo of the burrs to hello@barbellstandard.com, or as a reply to any order update email. We're happy to work with you to make sure that you get exactly what you ordered - a perfect pair of plates (or just a partial refund if you've already sanded them down!)