This special pencil uses ceramic leads for drawing on fabrics with a fine, clear line. No particles left like tailors chalk or hard to remove marks. Just remove marks with the Sewline Eraser or dab of with a damp cloth. No sharpening and messy wood shaving, just a click! advances the fine 0.9pt leads. Easy to re ll with up to 6 leads. Pack includes 6 lead refills.