My Prusa kit did not come with an easily adjustable z probe, so this was the first thing I printed. Designed in Onshape, it accepts m4 hardware to create an adjustable z probe without me having to reprint any of my parts. The dimensions are in mm.Clamps to axis using 2 m4 bolts. Press fit an m4 nut into piece and use long m4 bolt as probe, optional washer to ensure the switch can't be missed.