Features: Fully titanium construction, with a raw finish. Twist mechanism adjusts the length and reveals the pen. Compatible with over a hundred refill cartridges. Reversible, deep-carry pocket clip. Comfortable grip. Description: The Pocket Pro is the adjustable, refillable EDC pen of your dreams, designed and produced by Big Idea Design! Built to live in your pocket at all times, this pen boasts solid (but lightweight) metal construction and a secure pocket clip that will blend right in next to your knife. This pen telescopes with a twist to deploy the pen and to adjust the overall length to fit (almost) every refill cartridge on the market. Looking for a pen with more teeth? We carry a wide variety of self-defense Tactical Pens!