This is a toothpick cap with the outer contour dimensions of an M3 nut, which can be used to replace M3 long screws as pivot shafts in various scenarios. It can also be used to replace metal shafts in situations requiring pivot shafts. The diameter of the central hole in the model file is 1.8mm, while the diameter of a toothpick is typically 1.7mm. Printing with a 1.8mm diameter can secure a 1.7mm diameter toothpick. When fitting the toothpick cap onto a toothpick, it requires significant effort to do so. If the pivot shaft is fitted