A number of fibres appear between the two daughter centrioles, which are called the spindle fibres. Spindle fibers are the cellular structures that are used predominantly during cell division. It forms a protein structure that aids in the division of cells. They ‘re often referred to as mitotic spindles. It consists of 97% tubulin protein, and 3% RNA. The polymeric tubulin is formed by alpha and beta loop. The chromosomal spindle fibers bind to kinetochore and separate the cell.