UNI Mechanical Pencil M5-452 Kuru Toga 0.5mm Refill Rotating Tip Retractable Drawing Art Stationery School Supplies Lapices

KURU TOGA Classic. RotationEvery time the writing stops, the nib leaves the paper and rotates once with the lead core through 3 gears inside the pencil. Each time it rotates 9°, the nib part maintains uniform friction. Since the part that contacts the paper can be kept fine, so Writing lines can be sharper and thicker.There are 3 gears inside the pencil, and the middle gear is connected to the lead. Longitudinal movement by pen pressure that produces color when writing. It meshes obliquely with the other 2 gears, causing the lead core of the intermediate gear to drive the pen tip to rotate slightly each time the pen is dropped. Each rotation is about 18*20 strokes to complete one rotation.PS:The working principle of KURA TOGA is that every time the writing pauses, the tip of the pen leaves the paper surface, and the lead core rotates once is not in non-stop writing, the lead core keeps rotating; it means that it does not rotate unless it is not paused during the writing process. The pressure pen is too light.