Found some tool parts but need to know from what tool???

[Opentoe]

I found these tool parts from all the watch tools I have but can't seem to find what tool they are used in. I'm guessing a screw driver type looking handle with an end that screws in/out so these bits can be taken in and out. Does anyone recommend these? I went on a watch tool buying spree a few years ago and barely used them but have a bunch of tools. I even have many Dumont tweezers. Anyway, here is a picture.

[CADstraps]

I would drop this in the watchmaking forum. I lurk there from time to time - I know nothing about watchmaking, but am often facinated by the acute level of knowledge some of the regulars there have for what appears to be the smallest, seemingly insignificant bits, pieces, and parts.

As a highly specialized mechanic, it makes for good reading.

[Janne]

A nice set if you, like me, have a screw (or two) loose!

[mikeinpa]

They look like reversible screwdriver tips. I know a little about watch tinkering and can tell you that I wouldn't trust a precision screwdriver with reversible tips. A good set of watchmaking screwdrivers should be one size per individual screwdriver, as seen below:



Just my .02

[mike120]

I believe that they are for the type of springbar tools that Crown and Buckle has on their website.