Eastman truss rod - what size socket?

[TEvans]

Hello! Wondering if anybody knows the correct size socket to adjust an Eastman truss rod. Hopefully someone has had some experience with it. I do most of my instrument servicing on my guitar and basses. And paying 50 bucks to have a shop adjustment done is a little too much for a fix-it-yourself kinda guy.

I figured I'd order from stew Mac, as they seem to have some thin walled sockets that I won't have to file down. Shaving wood off of the instrument is not an option.

Thanks for the help (that I hope is coming!)

[Ron McMillan]

Is it not simply a 4mm allen key?

[TEvans]

No. It's not an Allen key, however, that would be convenient. I believe it needs some kind of socket. If anyone knows the size I need to order, let me know!

[Marvino]

My eastman, which is a 2005, uses an 8mm socket. Just adjusted it 2 days ago.