This Prym Chalk Pen & Cartridge Set is perfect for writing, marking, and drawing on a variety of materials including textiles, paper, wood, and plastic. The set includes 1 chalk cartridge holder, 8 colored cartridges, and 8 white cartridges. A sharpener is also included. This versatile tool is suitable for a wide range of handicrafts and hobbies, making it easy to change cartridges and mark or trace on almost all surfaces.