A bike holder for a Sony Xperia Z1. I use it to play Ingress when going to work... Of course it's also handy to have any kind of GPS apps running to guide your way or to provide statistics about your trip. The phone is held really tight by the holder. I don't fear that the phone might fall down. Also, so far there are no scratches on the phone. Therefore, in the end, I'm quite happy with the holder. Use four bolts (40mm x 4mm) with nuts and washers to connect the two pieces on the handle bar. If it does not fit tight, you can put some rubber (band) between the holder and the handlebar. If your handlebar has a different diameter than mine (22.4 mm for me), you can easily change the diameter in the OpenSCAD file.Use four bolts (40mm x 4mm) with nuts and washers to connect the two pieces on the handle bar. If it does not fit tight, you can put some rubber (band) between the holder and the handlebar. If your handlebar has a different diameter than mine (22.4 mm for me), you can easily change the diameter in the OpenSCAD file.