The design is customizable, you can adjust the size of the clip or add a label (in multiple fonts, including braille). Additional parameters can be used to tweak the design for other printers and plastics. The example files were created to work with ABS plastic, print matching inside and outside files to assemble a clip.
This design includes customizable parameters so it can be used with other plastics and printers. For printing in ABS, most of the parameters shouldn't need to be changed. Take a look at the customizer image for more info on the customizable parameters.
To assemble, insert one end of the inner clip between the hinge sections of the outer clip, and twist the other side in.
To open and close, bend the entire clip (it acts like a spring) until the inner clip has enough room to clear the end of the clip.
Support material recommended for the hinge.