Magnetic 2-in-1 Eraser works on both chalkboards and whiteboards, a great choice for the classroom or office. The felt eraser pad is reversible and excellent at removing chalk and dry-erase ink to always deliver a perfectly clean writing surface. The 2-sided reversible feature of the pad means you get twice the lifespan out of the eraser, simply flip it over and start fresh. Ideal for magnetic chalkboards and whiteboard, this eraser is also magnetic. You can store it directly on the board surface so it is always close by when you need it. This magnetic eraser also features a Spot-Erase Friendly Form. This shape is designed to help you erase those hard to reach corners of the board, and is great for a quick spot erase. *Magnet will not adhere to Quartet Infinity Glass Marker Boards.