I believe they are erasers. There is also a Skeletor one, and possibly a Teela... not quite sure or any others. Hope this helps!
We used the Orko to be "in-scale" with the vintage toys when we were kids.
Top Ten MOTUC wants: Sagitar, Great Black Wizard, Fang-or, Dragstor, Peekablue, Skeletor's Skeleton Warriors, Despara, Evil Seed (all era) w/Odiphus, Illumina w/Sleetah, Lady Slither
The figures sold cheaply but the buyer hasn't paid. Will likely be re-listed this weekend.