Name this lathe part

[surfrod]

Hi;


I have an old Central Machining Lathe.
It is sold by Harbour Frieght.
I need to replace the part in the attached picture.
Sorry for the picture quality.
You'll love this.......
I don't know what the name of the part is.
I would guess it is a chuck, but after searching
the web, all I have found is adjustable chucks.
I have managed to break off all 4 of the parts
that would hold the wood still.
Makes it hard to turn when the wood turns also.

Any help will be appreciated.

Thanks
Surfrod