Starrett PT28314 - Collet Adapter for 827 Edge Finders
This is a timesaving accessory for Starrett 827A Edge Finders. It allows quick installation and removal of the edge finder, eliminating the need for collet changes on Bridgeports and similar machines. It can also be used with any other attachment with a 3/8in post. The progressive steps are: 1/4, 5/16, 3/8, 1/2, 5/8, 3/4 and 1in. Step depths vary from .100in to .200in.