One can learn to tie the Prusik (not related to Prusa) knot or use my ingenious hook for securing objects. I have created two versions of the clamps:

1. Outside Hook - This version is simple to print and is my personal favorite.
2. Inside Hook - This version is slightly more stylish and features a protected inner hook. This design reduces the risk of injuries, especially for children. However, it is not as strong as the outside hook version and may be a bit more challenging to print.

Both versions are designed to accommodate three common paracord diameters:

• Cord 550: 4mm (according to specifications)
• Cord 550: 3.8mm (dimensions of some brands)
• Cord 750: 5mm (also commonly used for various other ropes)

You can scale the hooks proportionally to ensure a proper fit for your specific cord.

These hooks are much stronger than typical clothespins. Their strength doesn't rely on springs but rather on the design of the side lips. When under stress, the cord is prevented from slipping through the lips due to the direction of the pulling force:

When I tested them, they were able to hold over 20 kg when printed in PET-G. The actual strength may vary depending on the material used and the specific dimensions of the paracord.

Printing Instructions:

• Materials: ASA, PET-G (Note: PLA can degrade over time and the clamp is intended for outdoor use)
• Print orientation: On its side, as shown in the attached picture. For increased strength, the print lines should follow the spring mechanism.
• Wall count: Use at least 4 walls for added durability.
• Brim: Optional but can be useful to improve adhesion.
• Supports: No supports are needed.

2023-08-30: MK2 - improved for printability