Protect your work and erase only what you need with high-quality, precision erasers that will not damage paper. The Mono Zero eraser is designed for erasing the very finest, most minute details. With tips in two shapes and sizes for correcting work, the pen-style body is easy to use and store - or use the convenient clip for on-the-go corrections.Available in round (2.3mm) diameter, or rectangular (2.5mm) diameter. Refills are also available.