This product comes with 2-parts.

First Part:

Dial Indicator:

Full Name: 196B1 Universal Back Plunger Dial Indicator

P/N: 196B1

Range (in): .200"

Graduations (in): .001"

Dial Reading: 0-100

Attachments: Indicator with 3 Contact Points and Adaptor Only

Dial Color: White

The Starrett 196 Universal Back Plunger Dial Indicator features graduations to .001" and 0.02mm that handle by far the majority of jobs. Shank diameter is 1/4" (6.3mm). Antimagnetic models are also available – (inch reading) 196A6Z and 196B6. For full use, the operator first chooses the proper contact from the three hardened contact points that come with each model. Then the contact should be brought against the work with enough pressure to give the hand one full turn. Set the hand at zero by rotating the dial with the knurled bezel. This provides one full rotation of the hand both to the right and left of zero, showing a rise or drop in the work and the amount of that variation. 0-100 with 3 Contact Points and Adapter only This provides one full rotation of the hand both to the right and left of zero, showing a rise or drop in the work and the amount of that variation.

Second Part:

Holder:

Full Name: 657AA Magnetic Base Indicator Holder - Complete Set

P/N: 657AA

The Starrett 657AA Magnetic Base Indicator Holder is for use with all Starrett Test, Back-Plunger, AGD, Dial and Miniature-Dial Indicators. Also accommodates similar indicators of other manufacturers.