Knuckleduster and Bottle Opener in One!

thingiverse

This is a knuckle duster and a bottle opener all in one. I print it at 0.3mm layer height with 3 perimeters and 30% infill. You can lower the infill it you want it to print faster. But definitely go with at least 3 perimeters for strength. Also, this thing is a little bit large for my average size hand, so unless you have large hands, you should probably scale it down to about 90%. Enjoy! Designed in Autodesk Fusion 360.