Equipped with the unique bidirectional bolt design, the NTP31 is a multi-purposed tool which is able to pass the security screening and given the functions of self-defense in life-threatening situation and daily writing.
Featuring a convenient and stable lockout, the slider in the unique bidirectional bolt mechanism can be skillfully maneuvered in the L-shape groove to select and retract either the pen refill or the tungsten steel tapered tip
The hardness of tungsten steel tapered tip is measured by the Rockwell scale (89-92.5HRA), which ranks only second to the hardness of diamond.
The rigid stainless steel clip enables the NTP31 to be easily clipped to your pocket, shirt or backpack and avoids loosening and loss of the pen.