NTX700 truss rod hex key size
 

Picked up a used NTX700 and it came without the truss rod wrench. I would appreciate someone confirming the size. The Yamaha FAQ page seems to indicate 5mm but the post is a few years old and very general. Looks like 4mm to me.

Thanks!

5mm sounds about right. Might need a ball end type to get the fit right.

Great tip for the ball end, thank you.