6 piece set in great condition. Not sure their exact use. The item "Vintage Starrett Dial Indicator Case Extras Machinist Tools" is in sale since Tuesday, November 29, 2016.This item is in the category "Collectibles\Tools, Hardware & Locks\Tools\Machining". The seller is "microman_0" and is located in Las Vegas, Nevada. This item can be shipped to United States.