4pc Hardinge 16c Hex Collet Set 3/8 7/16 (1/2) 3/4 Metal Lathe Machinist Tool Posted on April 20, 2025 by admin in hardinge 4pc Harding collet set, one has been abused and is no longer legible (could be sae or metric as company had both for making hex tools and bits). Be sure to view our other items for more great tooling finds. admin admin wrote 4867 posts