Review on Flow Rite MA 023 Screw On Strainer by Darryel Tokarczyk

They work. Manufacturing tolerances and quality control are not of paramount importance. The screens look almost hand-sculpted. Not symmetrical and the two I ordered are shaped differently and threaded at an angle. They don't just rotate. Almost the entire size is a hair's breadth smaller, so you'll need to line it up properly and use some force when twisting it to start and find the right angle to screw it in.