Classic square tailor’s chalk housed in a protective plastic case with a built‑in sharpener to refresh crisp edges. Make precise, removable guidelines on garment fabrics for darts, pleats and hemlines, then sharpen the chalk edge for fine lines as needed. Keep it in your tool kit to prevent breakage and keep chalk clean between fittings and sewing sessions. Test on a scrap first and adjust stitch length and tension for best results.