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
This should be all you need.

http://www.homedepot.com/p/Husky-SAE-Metric-Folding-Hex-Key-Set-17-Piece-HFHKSM17PC/202934904?N=5yc1vZc265
Zd, god recommendation although I find the the folding sets are rather cumbersome to use especially in tight quarters like around a tonearm etc.

For precision tools my recommendation is Wiha Tools which offers amazing quality and relatively good pricing. For an example a single 5/64" Allen head screwdriver is only $4 + shipping etc., a complete set of Allen screwdrivers only $32.80 as with anything you get what you pay for these are high quality professional grade tools.

More information here Wiha Tools

Best of Luck

Peter
Thanks all for your help. Ofcourse I did contact Graham, but he didn't respond. Also wasn't sure if the tiny screw needed an Allen key.
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.