Just started looking into building my own sets of irons.

[Scarecrow]

Then stumbled across this video.

http://www.youtube.com/watch?v=JDWHoaFum-I

At about 7m30, he uses something (rubber I assume) to keep the head attached to the shaft.
Anybody here know what it is?
I'd ask my builder but I don't have it in me to tell him i'm taking the bulk of my business elsewhere-my garage.

[IlliniGolf]

I don't have a ton of experience with it so I don't know but maybe John can chime in with some hints.

[RhodyGolf]

Don't think that is something you would go out and use on the course.  It seemed to be just a shim so that they could test for the spine of the shaft.  There are other methods to test spine as well...

[Scratch2Plus]

Yep, just a shim. Ive seen it done using a rubber band and wiggling the clubhead on. Just as long as its secure.

[Charlatan Heston]

Just a shim.

There's a guy at work we call Shim.  Cuz all he does is take up space.

[Scarecrow]

Thanks fellas!