Hello ianc,
You are correct! I was just reading the ID specs from my Hazet tool catalog. Its weird bc I double check'd, it clearly says 97mm but thats wrong. Here I went and measured the ID (inner diameter) myself. I am guessy a +/- 1 mm tolerance is ok. I just know this is the CORRECT tool from Hazet, # 2169-6 It fits very snug too. So I would say 87 mm is the corect ID. Sorry for the confusion. Don't know why Hazet has a type-o like that in their catalog.
