Bottle opener!
100% functional as an SMT End Stop, it's even made of the same nitrided HT steel.
Comes with M4 shaft clamping SHCS and high quality key ring.
Note: no standoffs, mounting fasteners, or shafts are included with the bottle opener. Just use a blunt Ø5.0 drill bit and some M8 bolt you found on the floor and cut down like the rest of us.