Thinned it to 25mm thickness and printed pairs of them. The worked great for hanging pictures. CA glued them to the center of the top frame , nailed the matching piece of the pair to the wall (stud for heavier frames). Slip the picture over the wall cleat and adjust right and left to your liking. Works a lot better than trying to align holes on the back of the frame.

printed nicely

Very accurate. Printed several sets on my A1Mini

Very accurate. Printed great on an A1 Mini

Works fantastic!. Printer a half dozen in different sizes for my mother and mother in law so they could more easily open their water and soda bottles.

Tight fit but work great. I ended up printing a set of 4 using Petg

Intresting and fun to see and print.