This Automatic Chalk Wheel makes drawing and marking lines on fabric a breeze! The shape fits comfortably in your hand as you glide the wheel across your fabric, leaving a 1-2mm-wide line of chalk that is clearly visible. The loose chalk is easy to brush away after you've marked and cut your fabric. To use: Remove the canister of loose chalk from the wheel. Remove the plastic seal and carefully reinsert the canister into the wheel. Now you're ready to mark your fabric.