SMOOTHING - The Faber-Castell Sandpaper Block is designed for smoothing and refining various art mediums on paper, canvas, and more. QUALITY - It features high-quality sandpaper that effectively removes imperfections, pencil marks, and rough spots from art surfaces. VERSATILE - This tool is versatile and suitable for use with pencils, charcoal, pastels, and other dry art media, allowing for precise corrections and detailing. PORTABLE DESIGN - The compact size makes it easy to carry in an art kit or pencil case, enabling artists to make corrections on the go. Ideal for professionals and students who are frequently mobile. The quality of a sharpener, especially the blade, is crucial for optimum sharpening of wood-clad pencils. Due to their robust and hard leads, graphite pencils can be sharpened to a very thin point. Given their softer leads, colour pencils are sharpened to a shorter and blunter point. For optimum sharpening, we recommend replacing the sharpener now and then because the sharpener blade will become blunt over time. This results in more tip breakages.