This ring can hold a micro SD card. Since it is an integrally formed ring, no assembly is required. The lock part is made in such a way that it can be opened by inserting a fingernail from the surface, and by opening it, the SD card will slide out.

Available in 8 sizes from 18mm to 25mm.

Some of the filaments I had on hand were very difficult to print with, but with CREALITY CR-PLA MATTE, I did not even need to perform the following ritual.

In case of sticking, please follow the next steps.
1 , Spray the operating part with silicon spray, etc.
2 、Insert your fingernail into the four stripes on the outer circumference to separate them.
3 、 Pray
4 、Pinch with pliers
5 、 Since it is hard at first, spread it out with a cutter knife, etc.
6 、 Move it and let it blend in

Carefully follow the sequence of steps. Depending on the filament, you may not need to do anything, but it may take up to 5 minutes.

If the SD card does not slide out, the internal claw is broken and has failed. This is the most difficult part of the print process.

This model is optimized for 22mm, so other sizes may be difficult.