Originally Posted by
rm -rf
Sorry, can't think of any worthless tools.
My most
annoying tool is the Park Tool Campagnolo cassette tool. It needs a 1 inch wrench! So I got a Sears 1 inch to 1/2 socket. Then it slipped off the first time, half mangling the teeth. So I had to remove the quick release, apply the cassette tool, then put the quick release back on over the tool to hold it down. Grrr.

The Shimano one is the same. I usually use the QR skewer to keep it in place, and then tighten it with my Torque wrench and this deep socket:
http://www.amazon.com/DEWALT-DW2294-...rch_detailpage
Slightly cheaper than buying a $50 tool to do this job.
Or, you know, just use a Crescent wrench.