Time Factor Concern:
How long have they proven themselves not to crack & possibly the tapped threads in plastic not lasting? I would hate to see the handles loosen up eventually because of the less durability of plastic threads vs Erie's metal threads.
The brush appears shorter than the Erie 4" than we usually get. Hopefully, this is not looking just at its short term results ... like what happened with those once gushed about KR lighted vacuum nozzles that turned out to nice only in the short term.