Tool Mystery

[bikinchris]

No, that tool is for removing track cogs from a hub or individual freewheel cogs from a freewheel being held by a freewheel vice.

[11.4]

This is a weird thread.

One needs to grab a cog in three situations:

1. To immobilize a cassette while using a separate cassette lockring tool.
2. To remove individual cogs on a freewheel.
3. To remove track cogs.

You can do any of those three functions with either a tool like this or with a chain whip. I have both. I prefer the chain whip in all instances because it doesn't load one tooth preferentially and doesn't risk gouging a tooth. There are a couple fancy tools made for track use that are similar to this one, but most people just use chain whips because they don't damage the cogs. The tool under discussion here is more of an old-school tool that I don't see used as much any longer for all these reasons.