I purchased this when I purchased the Pentel Hyperaser just in case it was what
I wanted I didn't want to have to fuss about getting a refill. It would have
cost me as much in postage/shipping as it would the refill itself. Since I was
disappointed in the eraser -- it wasn't a pumice eraser as I thought I was
ordering -- it isn't something I've used yet to know if there's something I
could positively say about it.