SumoGrip EE-3000 Electric Eraser is designed to a round and ergonomic body for longer periods of use while still maintaining precise pinpoint erasing accuracy. The pocket-sized eraser provides a firm grip and is best known for its high eraser capability and durability. Eraser refills for the SumoGrip EE-3000 Electric Eraser. This electric eraser is designed with a round and ergonomic body for longer periods of use while still maintaining precise pinpoint erasing accuracy. The pocket-sized eraser provides a firm grip and is best known for its high eraser capability and durability. Avoid contending with bulky AC electric erasers - the AAA battery-powered motor ditches the cord and weighs only 2.9 ounces. With over 10,000 RPM, the strong torque makes it easy to remove graphite marks and create fine details to your artwork. Keep the handy eraser by your side for personal studio use or freelance commission work. Designed for comfort and control, the SumoGrip Electric EE-3000 is compact for storage and geared for mobility.