Quartet - QRTBFEB2 Two-in-one eraser features a magnetic design to let you easily keep track of it by sticking it up on your magnetic board surface. It erases chalk or dry-erase ink and is reversible for twice the use. Durable handle fits comfortably in your hand for maximum ease of use. Plus, the unique shape of the eraser makes it easy to reach and erase writing at the corners of your board.