I use this fancy expensive broom to clean me some solar panels. It broke almost immediately, because the threaded part was short so screwing it in created stress. 

I've printed the replacement with w a though hole with a longer thread. 

I printed at 

• 0.5mm nozzle
• with 50% infill, which honestly didn't make much difference because of…
• 4 walls :)

Anyway it holds just fine.