The collets measure 8mm at the threads. Overall in good condition. The item “LOT OF 25+ VINTAGE POCKET WATCH WATCHMAKER LATHE COLLETS REPAIR TOOL PARTS” is in sale since Saturday, July 23, 2016. This item is in the category “Jewelry & Watches\Watches, Parts & Accessories\Parts, Tools & Guides\Tools & Repair Kits”. The seller is “midwestestate” and is located in Chicago, Illinois. This item can be shipped worldwide.