12-N-1 Whiteboard Eraser features 12 separate felt layers. When top surface is too soiled to erase, simply peel off for a fresh, new, felt erasing surface. Eraser offers a sturdy plastic holder for easy grip. Use to clean both chalk and dry-erase surfaces. Eraser is great for use at home, office or school.12-N-1 Whiteboard Eraser features 12 separate felt layers. When top surface is too soiled to erase, simply peel off for a fresh, new, felt erasing surface. Eraser offers a sturdy plastic holder for easy grip. Use to clean both chalk and dry-erase surfaces. Eraser is great for use at home, office or school.