Writes Through Anything: Permanent ink powers through water, grease, and mud without clumping or smearing — no matter the conditions.
 
Pressurized Cartridge: A high-performance pressurized cartridge with a precise 0.8mm point delivers reliable ink flow in temperatures from -30°F to 250°F, underwater up to 35 feet, and at any angle. Replacement refills are available separately.
 
Rugged, Lightweight Barrel: The durable ABS barrel and tip are built to withstand crushing, bending, and heavy impacts — tough enough for the most demanding environments without weighing you down.
 
Sure-Grip Texture: A triangular barrel with a file-textured grip keeps the pen firmly in hand, even with gloves on or in wet, slippery conditions.
 
Easy One-Handed Operation: An oversized button and heavy-duty spring mechanism deliver a satisfying, reliable click — designed for smooth single-handed use when your other hand is occupied.
 
Secure Clip & Lanyard Loop: A strong plastic clip holds firmly to pockets and gear, keeping your pen within reach at all times. A reinforced lanyard loop allows easy attachment to clipboards, bags, or equipment for added convenience.