Original model is meant to fit on this specific apple watch band but with some finagling it should fit on most watch bands and watches. I have also added a version that locks into the holes on the Nike sport watch band. And by some act of God, both models also fit perfectly onto molle webbing. There is also a fusion file for those who want to make their own versions.

Print:

• .2mm nozzle
• .05 layer height
• no supports needed

Assembly:

• use 2x: 6mm diameter x 2.5mm magnets(for me they were sold as 6x3mm mags)(2mm thick mags should work but do not seat as much) 
• blade used is a standard pencil sharpener blade

If you got any questions please feel free to comment. I probably forgot something in the instructions.