Which Allen key for Graham Phantom II Supreme?


I own a Graham Phantom II Supreme tonearm and need to lower the arm lift just a little bit. To do so I need a small (probably) Allen (hex) key to unlock the tiny bolt which holds the arm lift in place.
However can't figure out what key I need. If it's an Allen key it's certainly not a metric size (tried them all). If it's an American size, which size does fit?
bril12
You can get an Allen key with a long shaft and a handle, which might make it easier to apply the torque necessary to loosen the Allen bolt.
Well. The 5/64" Allen key isn't the one. It's for unlocking the screw to rise or lower the complete arm to set VTA/SRA.
What I was looking for was a key for unlocking the tiny, tiny screw for the armlift with handle, used to rise of lower the armwand/cartridge on the record.

Anyone who knows what size of Allen key is needed?
Oops, sorry about that misread your post, the allen wrench needed for the Cuing Device is a .050

Best of Luck

Peter
Beat me to it Peter. Yes it is 50 thou.

Bob supplies a full set of these things in individually labelled re-sealable bags. This one is labelled "Cueing Device - Adjustable Height Wrench"

The 50 thou is quite small and not easy to find locally. They're also dead easy to lose which is why I've got 4 of them(!)