what is this tool for?

[stirling lad]

Ive had this little thing kicking about for years now and I had no idea what it was for until recently when I spotted another and an explanation of what it done,,  but for the life of me I can't remember now,,It looked to me as if someone had just pressed it together from 2 types of tap to get round a problem but apparently not,,,can someone enlighten me again please
...mike..
 

[shipto]

tyre valve tool?

[sparky961]

Definitely a valve stem tool.

You can remove/install the core with the small slotted end, and I think the one that threads on allows you to pull a new stem through the rim when installing it.

[stirling lad]

Ahhh! yes,,   I had remembered something about tyres but I thought I  was getting mixed up..its been bugging me for a few days now but thanks to the madmodder think tank I can now investigate just how its used..
thanks Shipto and Sparky..

...m...

[shipto]

one end tightens and releases the valve assembly itself while the other cleans the internal threads and the final bit cleans the outer thread and may have a pin inside to release the air out of the tyre prior to removing the valve assembly.
At least thats what i seem to remember about them.