The pivot axle for a Wolftooth mountain bike seat post dropper controller. Part can be purchased online, I figured that out after I designed this lol. I printed it at .16 layer height with normal auto supports. Printed in PETG. Fits perfectly on my bike, already taken a few spills with it and its held up well, I'd imagine it would breakaway with the layer lines in a serious crash (as designed) but have not tested it. Solidworks file included in case you want to make some changes.
The author marked this model as their own original creation.