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Old 04-28-21 | 05:19 PM
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Lakerat
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Joined: Oct 2008
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I'll hazard they are the guides for the bottom bracket facer. One for English, French and Italian. You screw those in to the bottom bracket, insert a rod which locates the cutter.

See photo marked 725 here: Bicycle Frame Preparation by BikeRaceInfo

Last edited by Lakerat; 04-28-21 at 05:25 PM.
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