These chalk cartridges are special because, in addition to precise line marking, can also carry out exact point marking. Use on a wide range of surfaces: textiles, wood, paper and plastic. Use for hobbies, sewing, quilting, model building an more. Break-proof packed, easily changed thanks to the patented hold mechanism. Excellent for fabric use, washes out without a trace, even after ironing. No wax, natural chalk. Eight white and eight assorted cartridges. Includes chalk holder and sharpener.