[CR]question about the ICS on Ebay

(Example: Framebuilders:Cecil Behringer)

Date: Sat, 15 Dec 2007 07:11:46 -0600
From: Tom Hayes <hayesbikes@gmail.com>
To: "Classic Rendezvous" <classicrendezvous@bikelist.org>
Subject: [CR]question about the ICS on Ebay

On the ICS bike on German Ebay at the following: http://ebay.com/<blah> is the the purpose of the hex screw in the middle of the seatpost?

Thank you.
Tom Hayes
Chagrin Falls, Ohio USA