Found this little kit for brush blade mounting. $10
Cup Washer and Nut together on Amazon with quicker delivery than the Ryobi Washers we bought.
i
think these
look like 10mm pieces.
See what you think
Can't find any detail specs anywhere, but in the comments various buyer said it fit their 80v Kobalt and some said it fit their Echo. So maybe those are good signs that those trimmers will be 10mm output shaft. One said it was LH/Reverse threads.
The arrows indicate LH as well
https://www.amazon.com/MTD-791-18001...030277&sr=8-19
8mm Ryobi Washers for Compare
