Package Content: You receive 4 revolving pens and 2 revolving pen tutorial, enough to meet your different usage requirements and replacement needs. Reliable material: The rotating pen adopts a symmetrical design, the pen tip is made of soft rubber, the pen is made of ABS material, and the dynamic balance support ring is made of aluminum alloy, which is reliable and strong, and can be used for a long time. More stable: This rotating pen is about 22 cm / 8.6 inches long, enough to use; stainless steel beads are embedded at both ends of the pen to achieve a balanced weight, so you can easily turn the pen. Decompression toy: This rotating pen is suitable for children and adults; you can use this pen to train your hands, eyes and grains, thereby improving your concentration, memory and learning ability; it can also help you relieve work and life pressure. Best gifts for gifts: You can give these game finger pens as gifts to friends, relatives, colleagues, and classmates on Thanksgiving, Christmas, Year, birthday and other holidays to express your love and care. Colour: black+silver Material: ABS+alloy Package Contents: 4 * pens Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.