Pen Style Chaco Liners by Clover
One can never have too many marking tools and these pens are really, really clever. They have a tiny little wheel which dispenses chalk to mark your fabric. It's very fine, so very accurate
Comes in two colours
Easily refillable too !!
Used this in white to make a shoulder bag, worked like a dream. Will be using this for all future markings. Will wait and see how long the chalk lasts but the pen is refillable. Will probably get another in a different colour.