This 8 pieces tailors chalk set includes 8 tailors chalks in 4 colors (White Yellow Red Blue) appropriate for both professional and home tailoring. Mr. Pen tailors chalks have a triangular shape which makes it easy to hold and make markings on fabric allowing for a clear and precise result. Mr. Pen tailors chalk set is also great to use with Carbon Paper when making pattern markings. This allows you to easily transfer your designs onto the fabric without worrying about smudging or fading. It is important always to test the tailors chalks out on a piece of fabric before using them on your finished project to check for colorfastness and clarity of lines.