The shafts only come in one size (dia. and lenght). You'll need to cut
them to suit your bow and draw length.
The diameter of the horn nocks are the same, but you have different styles.
I have purchased the ones that cost 7.75 because they are shaped like
those used for both Japanese and Chinese arrows. I would think the styles
that sell for 6.25 would be fine but they do not have the same look. I
suppose the ones with the long tangs would be good to help reinforce the
arrow shaft and that could be useful. So you if you want them only for
their own sake then the 6.25 ones would seem fine. The others work nicely
if you are shooting with a thumb ring, because there is nothing to get in
the way. Remember also that you'll have to do a little work with the
shafts to get a good fit. Because the shafts vary somewhat in interior
diameter and wall thinkness you might have to either trim or shim
depending. I also use Gorilla Glue to secure them. It produces a very
good bond with the bamboo but it is still possible to recycle the nock if
you break the shaft by heating it up in hot water to unbond the glue.
Hope that helps.
Answered on 1/18/2013 by Anonymous