HONYSEW Chalk Wheel and Refill Fine Line Fabric Marker Tailor's Chalk Blue, Red, White, Yellow Choose Color (Chalk Wheel Blue) CHALK WHEEL AND REFILL The chalk fits in the large end and the narrow end has a metal roller that draws the chalk on your fabric while you roll it along Makes extra fine lines; Allows you to draw chalk lines on your fabric for alterations and marks Mark fabric lightly and remove all marks before pressing Something to know if you buy this: The package doesn't mention this, but before you can use it, you will need to extract the chalk cartridge, pry out the bottom cover of the cartridge to release the chalk, and reinsert it back into the unit. This isn't difficult, it's just a little fiddly,but it is safe for shipping . I suggest performing this operation over a piece of paper. There won't be a lot of chalk spillage, but you are likely to get a few stray grains.