This portable pen with bolt mechanism is specially developed for G2 gel refill, which provides you excellent writing experience with gel refill. Moreover, the G2 gel refill is easily available online and in supermarkets. The probe pre-installed in this pen is the G2 fine tip gel probe, line width 0.5 mm. .Made of all metal 316 grade stainless steel shatterproof body with balanced weight to write and hold. .Extra weight is ideal for shaky and arthritic hands, a great writing aid for the elderly, carpal tunnel, Parkinson's disease and others who need a sturdy pen. Stylish and stylish design, suitable for men and women. .Search for more CNC usins pens, titanium pens, brass pens, carbon fiber pens, fountain pens and other unique pens. Our designers are outdoor professionals and collectors whose products are adapted to real requirements and needs. We also hear the voices of our customers every day and, from time to time, we offer solutions to their concerns. Your opinion is very important to us.