Usage steps
1. Adjust the clamp mouth with the middle nut
2. Insert the pen into the clamp mouth
3. Tighten the nut to fix the pen
4. Draw while roller skating
5. Push the clamp to the other end
6. Draw while shaping with the end of the pointer






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Usage steps
1. Adjust the clamp mouth with the middle nut
2. Insert the pen into the clamp mouth
3. Tighten the nut to fix the pen
4. Draw while roller skating
5. Push the clamp to the other end
6. Draw while shaping with the end of the pointer