Dr Feickert Protractor

Just buy a complete set from Harbor Freight.  They are inexpensive and your customer will find the one that fits.  BTW, I doubt one could even purchase just a single Allen key.

Just checked my own. It's 2.5 (this obviously in metric)

Thanks for your replies - there really helpful. 

A guy with a protractor would also be a guy with a complete set of Allen wrenches, both SAE and metric.  Like me.

Just curious....

I've owned and used the Feikert many years. When I purchased it, there wasn't a hex wrench with it. What is it used for? 

There are 2 adjustments for the jig via thumbscrew.

There's a 2nd set screw found on the underside of the tower that holds it on the plate. Usually only requires unscrewing for shipping purposes.

+1 @lewm

i am fearful for the guy who bought the protractor if he can't get the right allen key for the feickert how is he going to mess with cartridges!!! 

@jjss49 not your problem. 

+2 @lewm
What can I say I have one set metric one set SAE, plus one set small for my bike, plus one set metric Long 14 inches plus for certain radio equipment, plus a set on my guns tool bag, and also about 5 or 8 separates that came with furniture to build and such, I'm not a mechanic but work with computers go figure.
My feickert protractor is still new in the box I haven't had a chance to use it yet.

I just realized I have issues

I modified my MFSL Geo-Disc after seeing a Feikert.  I added a straight edge ruler for better alignment to the pivot point of the arm.  I always hated the guess-a-mation when lining up the arm pivot point with the G-Disc.