The Spike stun gun has two sharp spikes.  It was designed this way so it could double as a striking self defense tool.  You would aim for the eyes or throat. The SPIKE stun gun comes with a rubberized coating, providing a comfortable non-slip grip. Resting discreetly in your hand, the triggering button activated by your palm. The Spike discharges loudly, easily able to dissuade a confrontation before it starts.

You insert your trigger finger in the hole and activate with the palm of your hand.