This is a large hook for multi board that is held in place with 2 large multi board bolts (found elsewhere).  I printed in PETG-HF with 8 walls, 15% gyroid infill for strength.  This hook is stronger then the multi board when printed properly.  Other materials and parameters should work but you may sacrifice strength.  The model can be customized to meet you length requirements.  Be aware, the longer the length, the less strength.

This nicely fit my needs in the garage for heavy items like extension cords and leaf blowers.

Multi board connectors I used:  [https://thangs.com/search/%22MB38%22%20creator%3A%22Keep%20Making%22?scope=thangs&](https://thangs.com/search/%22MB38%22%20creator%3A%22Keep%20Making%22?scope=thangs&)