A spiker roller having (i) a roller assembly (10) having a plurality of roller components (11) each having a peripheral wall (34) and a plurality of apertures (38) in each wall (34) and a centrally located hub or boss (15) surrounding an opening (37)； (ii) a multiplicity of spikes (18) which are each releasably retained within a respective aperture (38) of each roller component (11)； and (iii) a support shaft 12 which is insertable through each of the openings (37) of each roller component (11 ) wherein in operation each of the roller components (1 1 ) rotate independently of each other.
