Review on Uxcell Flat Knurled Nut Adjusting Hardware in Nails, Screws & Fasteners by Justin Kedzior

I use these on my old Wanhao i3 but I want to clarify that I drilled through the bed to fit an M4 screw instead of an M3 screw. The processing is ok, you can tell that it is a fast mass production, but the threads are clean. I plan on sanding the textured part to clean up some overly sharp/aggressive areas. Not perfect, but they're cheap and available as basic shipping.