Does anyone know what size allen wrench is needed to change a Bitzenburger fletching jig from 3 to 4 feather fletch?      
Would also like to know what size is used to adjust the feather degree because at the moment I've just been using pliers and its causing some wear.

Thanks,
Ari

I believe it is 5/64ths.

1/8" for the divot screws & 9/64" for the angle adjustments.

I'm sure Eugene is correct for his Bitz.  However, I have old and new Bitz's that have different allen sizes.  Best to just spring for a set of allens in US sizes.  Probably cheaper than buying a couple of single allens anyway.

Yeah I was looking on 3river and they have an allen wrench set, just wanted to make sure it had the sizes I needed.

Thanks

Yeah, mine have different sizes too depending on the age.

mine are 5/64" and are over 20 years old.   bought a couple extra allen keys from Ace Hardware for 49 cents each

Yes it is handy to have both sets of allen wrench sizes.

Sears has nice allen wrench sets---both Sae and Metric.  They "fold up and fit in your pocket too.

Joe

Just a dumb question, can you get SAE in the land down under? If not those are going to be some expensive allens.