This is how Games Workshop describe Gretchin......
Gretchin mobs make up for their shocking lack of quality with sheer quantity. The natural cowardice and feeble-limbed incompetence of the Gretchin race does not predispose them to the arts of war, and a typical Grot would prefer to have his head buried in a sporehole than to actually participate in a proper battle.
For the meaning of a sporehole ask Ray, he has one!
Painted up a while ago for another project that stalled back in the day! They are also resin.......