recognize these little collets?

[Mark914]

anyone know what these are for? got thse in a old box of machine tools.
one has a a scribe mark that says T2.

they are small, around 1 1/2" tall. what are they used on ? can i get a couple bucks for them ?

 

[454ragtop]

Don't recognise them, but I bet they go to a drill grinder.
HTH, Jim

 

[OccupantRJ]

Tap holder collets for a tapping head. Procunier and Ettco are two names.

 

[Mark914]

thanks for the responses, ill research it more