Hi all. I thought i'd double check as my memory is a bit faulty of late. Sutherland's 4th and 5th eds. list Stronglight extractor threads as 23.35mmx1.0mm. The 7th ed. couldn't be bothered w/ such arcane outdated nonsense. Barnett's Manual, 5th ed. gives the same specs. I measured my original Stronglight tool - it's about 23.1mm but my Stein/Stronglight extractor that i got from Bike Tools, Etc. is a healthy 23.3+. Both thread into a Stronglight 93 arm. For comparison my original TA extractor tool which is nominally 23.0mm measured out at about 22.7mm. I'm just concerned that if people start having 23.15mm tools made, they're gonna be a bit small. Granted we're talking about 1/5mm, but why not be accurate? Cheers. Billy Ketchum; Chicago, IL; USA.