Koh-i-Noor Battery-Operated Eraser, 8 Refill Erasers and 2 AAA Batteries Included (EB-1200) Eraser comfortably rests in hand for easy operation Total control by turning on with a simple push of a button Erases completely from paper, drafting vellums and film Eraser includes two AAA batteries and 8 graphite eraser refills Use with eraser refill pack (#EB-1200ER) contains 30 graphite erasers (sold separately)