There are two models, one for the right side, and one for the left side. I use this to hold a bag near my 3d printers. Handy to hold all those bits you get when cleaning a part.

To use: Just slip a shopping bag handle over the flange on each side. Slide them onto a table edge. Should fit tables up to 30mm thick. Feel free to modify it for your table.

Printing: Use supports.