This is a snap hook with a spring-loaded gate, carefully designed so it's easy to print with NO support needed at all. Dont’ print with PLA matte, especially for the spring part. PETG is strongly recommended. And obviously, DONT USE IT FOR CLIMBING OR ANY OHTER SAFE-GUARDING PURPOSE!

Assembly Guidance:

1. Align the spring to the circular part of hook. Make sure the square hole are aligned properly.
2. Put the snap pin in to the square hole until you hear a snapping sound of course. Make sure the horizontal line is at the bottom.
3. Give a little push using your thumb finger nail on the tip of the pin, if the spring gate does spring back smoothly.

Don't forget to share in the comments on what you used it for. Have fun printing. 😀

做了一个带弹簧锁闭结构的快速挂扣，全3D打印，无需五金件，零支撑。强烈建议使用PETG材料进行打印，不要使用PLA MATTE等哑光材料打印弹簧件(相信我，我已经试过了😂)。

虽然承重还可以，但请不要用于登山等安全防护用途！

装配指引：

1. 把弹簧和挂扣部件的方孔相互对齐
2. 把卡销从上方插入方孔，听到“啪”的一声就安装到位了。虽然不影响使用但半圆形记得朝上
3. 如果弹簧回弹不到位，用大拇指指甲轻轻地顶回卡销

别忘了在评论区上图分享，打印愉快！😀