[How-To] What is this for?

[DavidR8]

This small metal disk came with my Interapid 312-B DTI.
I can’t figure out what it’s for. I thought maybe it was a small screwdriver but it doesn’t fit any fittings on the in instrument.

 

[mmcmdl]

Wrench for changing the stem .

 

[DavidR8]

Changing the stems wrench .

Ahhhh thanks mate!

 

[mmcmdl]

You're moist Welcome .