Attachment for Casio privia digital piano pedals, holes are not tapped, but will easily accept 1/4 or 6mm hardware. 

bought a used piano that was missing hardware, so i designed this to fit, it seems to work well printed with PLA, most hardware for piano is 6mm, but i had some existing pan head bolts that fit the bill to use, holes not threaded, just screw new bolt into plastic.