Print a pair using tight enough infill for the strength of your application. They are reversed so the teeth mesh and then attached to a surface with screws so the cams can still rotate but not move up and down. For gripping surgical tubing I applied some self-adhesive non-slip material to the inside of the teeth.
Licence:
MyMiniFactory License. You can use this 3D model for your own commercial purposes. Please credit the designer when sharing this model.