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It is suitable for 6mm aperture perforated boards. You can resize and print it according to the size of the holes and the shrinkage rate of the consumables. Compared with other perforated boards, the hooks only occupy one hole and use less material.
Just insert the circular part into the hole.
Disadvantage: The principle relies on the size and holes to hold things in place. If the size is not appropriate, it may rotate or even fall off. Please adjust the print ratio by yourself.