Hinged combination pen holder

1、每个笔筒可以单独使用，也可以通过铰链组合，以便扩大容量，同时增加稳定性；2、分别打印可以得到不同的色彩，组合在一起具有强烈的视觉冲击，给生活和学习增添一抹活力；3、铰链的销子预留直径1.9mm的孔，使用M2的自攻螺丝和垫片将铰链锁定。1. Each pen holder can be used individually or combined through hinges to increase capacity and stability;2. Printing separately can produce different colors, and combining them together has a strong visual impact, adding a touch of vitality to life and learning;3. Reserve a hole with a diameter of 1.9mm for the hinge pin, and use M2 self tapping screws and washers to lock the h