Simple mount to hang the charger off a pegboard. Threads are M5 (with a bit of extra tolerance added) but have provided one screws as well. That way you can use your own screws, or print them separately and play with the depth. I did have one print I needed to screw through a bolt once before getting the plastic ones in more easily. Was tested originally with a board I printed myself found here. It's a bit tight and more snaps into place which I like. However, I tried on others I've purchased and though more loose, still works.