Keychain Self-Defense Track Spike Knuckle

Keychain Self-Defense Track Spike Knuckle

thingiverse

A compact, keychain-sized brass knuckle with a threaded top for attaching a track spike of preference. The standard thread size found on most track spikes matches the specification [12-32 Thread - In Dia. .210"], however if this information proves inaccurate, kindly notify.

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