Measure Twice Space Pen Ready for Any Situation

The Fisher Space Pen Measure Twice is a bolt-action tactical pen machined from high-strength 6061 aluminum, packing three practical tools into a daily carry piece that adds no meaningful bulk to a pocket or kit. Impact, scratch, and corrosion resistance come standard from the aluminum construction, making it a dependable choice for fieldwork, job sites, workshops, and unpredictable outdoor conditions where lesser materials would wear out fast.

Precision laser-etched scales run the length of the barrel with standard markings up to 3.5 inches and metric markings up to 9cm. The ruler sits directly on the pen and delivers an immediate reference point without tools, accessories, or unfolding anything. The bolt-action mechanism clicks open and closed cleanly, resisting accidental deployment while holding up through repeated daily use over months and years.

A tungsten carbide glass breaker tip sits at the cap end, designed to shatter tempered windows during a vehicle emergency. Tungsten carbide outperforms standard steel in hardness, making the tip reliable when force and speed both matter. The tip also functions as a self-defense tool, adding personal safety capability without changing the pen’s size or form factor.

The pressurized ink cartridge writes upside down, underwater, and over grease and oil, performing in temperatures from -30 to 250 degrees Fahrenheit. It lasts three times longer than a conventional ballpoint, and replacement cartridges are available wherever Fisher refills are stocked. When extended, the pen measures 5.53 inches with the refill deployed and 5.54 inches with the glass breaker cap exposed.

The Measure Twice Space Pen earns its place in any EDC kit as a bolt-action writer, a pocket ruler, and an emergency tool in one compact aluminum body that never asks you to compromise.