Airline rail adapter

I designed this key ring holder to secure light weight items in the trunk of my camping car.

You will need in addition:
- 1 lifting head screw M5x35
- 1 keyring 29.5mm diameter 2.5mm wire
- 1 compression spring as described in the picture

The screw plate and the push knob should be printed with 100% infill
The body can be printed with 25% or less infill

I glued the screw head to the plate