Another single use tool designed to make life a little easier. 

If you've had to do work on the rear end of a P3 Volvo's swing arms, axles, suspension, or similar, you'll know the little bent-metal screw on clips for the under-body splash guards like to break. This helps you remove, and reinstall them, without breaking them. 

Slot over center screw, and align “wings” into open grooves, twist, and remove. 

Print these 100% infill (Solid). They worked for me in PLA, but a harder filament would be more permanent. Should work with any 3/8" wrench and extension (for the recessed clip)