Features 1. ABCD answer pen, difficult to choose, hesitant to turn and solve. Gently flicking, smoothly rotating, and introducing low-frequency harmony is the melody that heals the soul. 2. Rotating core extraction: The number of rotations can reach 10000+times, with 120 clockwise rotation for core extraction and counterclockwise rotation for core collection. 3. Unidirectional rotation core design: Rotate the pen core clockwise to output, and rotate the pen core in the opposite direction to receive. 4. Silent bearing: Ball rotating head, small body, high energy, maintains stable rotation. 5. Suitable for the following groups: office workers, students, family members, and those who have difficulty choosing. Specification Material: ABS Number: 4PCS, 1PCS Color: Multicolor, Black, White, Blue, Orange Size: 15 x 1 x 1 cm Weight: 18 g Package Include: 1x ABCD Difficulty in Choosing Transfer Pen