ystudio Protable Ballpoint Pen is deisgned to have fine hanging function. You can wear it as necklace or hang it on your bag. When writing is needed, simply spin the pen off and you can start writing smoothly. With beautiful lacquer and brass trim, well-adjust weight balance and rebound mechanism, it becomes a must-have pen for you. It comes with a necklace and a shackle for you to create your unique lifestlye. Refill is a ystudio customized 0.7mm gel-ink refill which writes smoothly and enjoyable. Specs Material: Brass Specs:9 X 10 X 139 mm Weight: 30.0g (without tail ring) Refill: ystudio ballpoint pen refill (0.7mm gel-ink), also fit for Parker-type ballpoint refill Use & Care You can create personalized brassing effect by removing the paint on the surface with sanding paper which is attached in the product’s package.