We actually designed this for making a canvas frame to contain some acoustic foam panels and cover them in material. This is for a large sound deadening panel for our conference room, which is a bit echo-y. There are three versions - a Left and Right hand with a hanging hole, and a version with no hole.If printed in PLA you'll get a slightly more rigid product, but works on ABS as well. It can withstand printing at 0.3mm and one perimeter so each one takes about an hour on our Robox with the 0.8mm nozzle.