2. Hold the pen and rope at the same time and put them into the hole on the edge of the hat. PS: You can also use a thinner gel pen, because the hole in my sweater has a circle, so I can only use a thinner gel pen instead of the core.
3. Insert and hold the pen and the front of the rope (to avoid falling off) and push in slowly. Note: once inserted, don't look back, or the nib will fall off the rope.
4. Shrink together like bugs, then let go and let the pen go with the rope. Note: Be gentle and don't hook the thread in the brim.
5. Finally, pull out the pen and rope from the other end! Carefully clean the hooked line!