This is a Wurkkos FC11 Headlamp Clip (for Petzl Tikka) to attach your flashlight to the side of a headlamp band. Right now, it only works on my old Petzl Tikka strap (25mm and with small buckles on the end), but I may make a version with open holes. Also, the angle is fixed in this model. I might work on a better slide on clip with adjustability, but I just wanted this made quickly for a backpacking trip.
The author marked this model as their own original creation.