A
kneadable (say: needable)
eraser is the
demented love child of a regular
cheddar cheese pencil eraser and a
stout wad of
silly putty (
tm). Used only by true artist(e)s, these
wonderfully squishable exorcisers of error are usually grey-ish in color, and are indeed quite effective at what they do.
Their
moldable,
variable topologies gives them a
succinct advantage over regular erasers, although their
durability does (
unfortunately) take a hit. Once, during
chemistry, I sculpted
ball-and-stick model complex organics using only
toothpicks and a kneadable eraser.
Stylish AND practical, as they say.