Online Community of Zenith Builders and Flyers
standard double edge deburring tool, looks like a Noga. Here is a amazon link https://amzn.to/3f4fpLf but you should be able to get it fron any industrial machine tool supplier.
$21 but I think they are having a 20% off sale right now.
Be careful of the amazon one. I was going to order one too and noticed a delivery date of 1-2 months when I checked out.
I canceled that one and ordered off of ebay and verifiied the supplier was in the US。 Presumably I will have it by the end of next week.
I used amazon as a reference and didn't check availibility, a quick check shows both travers tool and msc have them in stock. as a society and also as builders we now go first to amazon and the dedicated aircraft supply sources, they are not always the best or least expensive source for tools or materials. As a scratch builder I can almost always source the same materials from a local supplier for at least 1/3 less and no shipping. I usually cant save as much on tools and supplies, but it is worth the time to research possible sources as savings can sometimes be had.
Spruce has them as well.