Tactical Sharpies are a perfect addition to your edc gear. The sharpie is gutted out and replaced with a G10 or Hardened steel rod that obtains a sharpened point.
The G10 Tactical Sharpies will pass a metal detector with no issue, as it contains no metal. Perfect for all those non permissive environments.

G-10 is a high-pressure fiberglass laminate, a type of composite material. It is created by stacking multiple layers of glass cloth, soaked in epoxy resin, and by compressing the resulting material under heat until the epoxy cures.
The silver Sharpies contain a hardened steel rod.