This process is driven by microtubule filaments which continually grow and shrink.
From the sciencedaily.com
This enables the formation of persistent kinetochore-microtubule interactions.
From the nature.com
More examples
A microscopically small tubule
Microtubules are one of the components of the cytoskeleton. They have a diameter of 25 nm and length varying from 200 nanometers to 25 micrometers. ...
(microtubules) Long cylindrical structures composed of proteins called tubulins. Microtubules function as cytoskeletal elements, a major component of cilia and flagella, and the mitotic spindle. Motor proteins are involved in microtubule based motility.