Tailor's chalk is an indispensable aid in sewing and sewing for marking and tracing on fabrics. A chalk pen can be used to make very precise markings on the fabric. A plastic brush on the end of the attached cap will help remove the traced chalk lines later. The chalk pens are available separately in white from Prym. A white and a blue pen are available in packs of 2 pens. Each pen has its own protective cap with an eraser brush.