The Allary Chalk Cartridge Set is ideal for hobbies, sewing, quilting, tailoring, model building, and more. Try using it for making labels, marking, and drawing on a large assortment of materials, such as textiles, wood, paper, plastic, and more. Cartridges come break-proof packed and are economical in use and can be easily changed. Set includes 17 pieces. Cartridge features a cushion-grip pen style. Includes 8 color and 8 white chalk refills.