Carry the Knuckle Spike Self Defense with you at all times. Can be attached to a belt.
Press firmly until you hear a click as the pins snap into place. Use an 1x M5 (30mm) screw and nut to attach to the belt.
The case is suitable for this model:
https://www.printables.com/cs/model/820987-self-defense-knuckle-spike/files
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