These are used by people every day at school they are in ever classroom
and most are electric so they work automatically. They work by having two
round spinning blades that spin around the end of your pencil shaving the
edges at a certain angle and then when you pull it out it is pointy. then
the shavings get droped into a holding area and then they can be dumped.
other sharpeners ar just blades that you put the pencil into and twist
cutting off shaveings and it drops into a hold ing containor.