The sleek SureFire Pen IV is precision machined from high-strength aerospace aluminum and hard anodized with a Mil-Spec black finish. It features attractive stainless steel hardware - the pocket clip, nose cone, and retractor button. Inside the Pen IV is an imported Schmidt easy flow 9000 ballpoint pen cartridge for smooth, effortless writing. Like all SureFire pens, this rugged, high-performance writing tool is tough enough to provide you with a tactical advantage in emergency situations.