Hi-Polymer Block Eraser is specially designed to lift lead markings off paper with very light pressure. It erases cleanly without scratching or tearing paper surface, and leaves no dust. High quality, latex-free eraser is non-abrasive and will not crack or harden with age, and remains soft and ready to use. Comes with protective sleeve to keep you and the eraser clean. Eraser should be used and stored with protective sleeve.