Alvin - Staedtler Battery Operated Eraser - The Alvin - Steadtler Battery Operated Eraser is an economical hand held battery operated eraser that is quite handy for students and professionals. It operates on two AAA alkaline batteries, with the simple push of a button. The electric eraser will continue rotating as long as the button is pressed. Includes ten graphite eraser refills. Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Creative Coldsnow is a pround retailer of Alvin graphic arts, drafting and fine arts products.