These kinds of discs are used to make DIY notebooks. Instead of binding pages using rings and a regular hole punch (e.g. filofax or burde-style), umbrella-shaped holes snap on to the discs. Although I ended up not using disc binders for my research notes, I know a lot of people love disc binders and strongly prefer them to other variants of note taking stationary.

This model size makes for a fairly thin bundle.

Specs

• Diameter: 24mm
• Thickness: 5.3mm

UPDATE 2025-08-26

I tried making a hole punch to go with the discs, but I couldn't get it right. If you want to pick up from where I left off, you can find the step files and writeup here [LINK]

If you like what I publish, make sure to download the models and rate the print profiles! It helps me out and lets me know what to improve for future projects! Thank you in advance!

Below is an AI translated description to (hopefully) be of help to Chinese speakers! Let me know if it is totally wrong!

人工智能翻译了这句话。如有不准确之处，敬请原谅！

这些光盘可用于制作 DIY 笔记本

与使用圆环和普通打孔机装订书页不同，蘑菇形孔可以扣在圆盘上。

我最终没有用圆盘活页夹做研究笔记，但很多人都喜欢圆盘活页夹

该机型的尺寸使得捆绑相当薄。

直径：24 毫米

厚度：5.3 毫米

如果您喜欢我发布的内容，请务必下载模型并对打印配置文件进行评分！这对我很有帮助，让我知道未来的项目需要改进什么！感谢您的支持！