Bed leveling nut

This is a a replacement nut which makes bed leveling easier. It's use is to replace the butterfly nut that is inaccesible at the bottom of the plate and difficult to turn from every corner. It's designed for the Anet A8 printer but perhaps it works with other printers with the same size.
Just put a spare nut in the center down-facing. You need to print 4 of those, one for each corner.