Hex key size for Celinder bridge?

[sonicaddiction]

Hi!
I've got a Celinder Vintage and would like to lower the string action but have no idea which hex key size I should use. Even the smallest key I have at home that fits my other basses is to big for the Celinder bridge. Does anybody have an idea?

Thanks!

Edited March 27, 2012 by sonicaddiction

[Platypus]

And the answer is 1/16" - I emailed Chris Celinder to check and he couldn't have been more helpful - offered to put a couple in the post, or drop one off with Martin at the Bass Gallery, when he calls in next week.