Thank you @lainebenthalljewelry for sharing this video of your “pipe deburring tool” -

“A great way to take the edge off the inside of a ring shank is with a deburring tool. Simply run the blade around the inside edge of the ring in a circular motion that allows the blade to swivel. It helps make the ring more comfortable for wearing. I found this tool on Amazon!” Thank you Laine for sending the video!
If you head to the Amazon Storefront in the link in my profile I have this tool listed under “Useful Tools For Jewelry Making” check your local hardware first 🤙