I've used these snow brooms for many years. And eventually they have all failed in that the end piece will spin uncontrollably as you try to use it. This is a simple bracket you install and it will stop that rotation. I used M3 sheet metal screws to attach mine. The holes are not optimized because I had already drilled mine for an earlier version of this bracket and didn't want to re-drill it. But they work where they are. I printed mine in ASA but I would guess most filaments will work.