This is a light holder for mountain bikes or road bikes, fits every 31.8mm handlebar. This is the 2nd version, I made it a bit thicker to improve the overall strenght. I work as a bike mechanic and personally tested the product for a couple months, it works in PLA but it's stronger in ABS.You will need a 5mm screw and nut. A 2mm spoke will be perfect as a pin for the closing mechanism.If requested I can modify the design according to your needs (different handlebar sizes, different lights etc...)Enjoy!Here you can find a video preview: https://www.youtube.com/watch?v=CWPs7IiAuNY