From the Super Mario Wiki
(Redirected from Pencil Pillar)
Beak Pillars are thin and short pillars with a sharp point at the end like a pencil. They come down from the ceiling or up from the floor. Most don't retract all the way, leaving their deadly point exposed. They are found in Super Mario World in the Chocolate Fortress and Larry's Castle. They are indestructable obstacles, but can be touched from the side unlike a Spike Pillar.