What is it? A small gate latch for our chicken coop. Scale up for imprisoning larger animals/general use.

How well does it work? Surprisingly well! Closes easily and doesn't open in the opposite direction. Strong enough for most purposes.

Any problems? The plastic hinge-pin thingo is hard to print at this small scale, a cable-tie or anything around the right size should work.

Other I hope to make some genuinely useful items for 3d printing. I'd love to hear ideas for things that haven't been done already.