[CR] What are these tools?

(Example: History:Norris Lockley)

From: "Aldo Ross" <aldoross4@siscom.net>
To: <classicrendezvous@bikelist.org>
Date: Sat, 17 Oct 2009 13:48:29 -0400
Subject: [CR] What are these tools?

I'm not familiar with these tools on eBay-France. What are they for, and how do they work?

280409596861

http://cgi.ebay.fr/lot-2-outil-cholain-pignon-chaine-velo-ancien_W0QQitemZ280409596861QQcmdZViewItemQQptZFR_JG_Sports_Cyclisme_?hash=item4149b6e3bd

http://tinyurl.com/yfkkv2v

Aldo Ross
Middletown, Ohio, USA