Foredom44T Handpiece Flexible Shaft Grinders - H.44T

Will it work with the Harbor freight rotary tool?

Will this work with the Dremel Fortiflex 9100?

How much end play does this have? I'd like to use it for sharpening end mills.

I need a recipricating hand piece that will work with my older Foredom flexible shaft unit! Do you have a good one that will last??