The Blackwing Pen is a thoughtfully designed rollerball pen that combines everyday writing comfort with a weighty, tactile feel. Made from precisely machined aluminium, this pen features Blackwing’s distinctive half-moon shape for a comfortable grip while preventing it from rolling off your desk. Its balanced weight feels substantial without being overbearing, and the dual-spring click mechanism delivers a satisfying tactile click with every use. Fitted with a smooth black Schmidt P8127 rollerball cartridge, it produces an expressive medium line and can also be used with other cap-less rollerball pen cartridges. Key Features Material – Precisely machined aluminium body for durability and a premium finish Shape – Ergonomic half-moon design for comfortable grip and anti-roll function Mechanism – Dual-spring click mechanism for a satisfying tactile click Refill – Includes a black Schmidt P8127 rollerball cartridge with smooth ink flow Compatibility – Works with cap-less rollerball pen cartridges Disassembly – Easily removable magnetic clicker mechanism for simple cartridge replacement Tip Size – Medium 0.7 mm tip for smooth, expressive writing Weight – 31 g / 1.1 oz for a balanced, substantial feel Dimensions – 5.5" × 0.5" × 0.5" The Blackwing Ergonomic Half-Moon Shape Pen is a refined writing tool that balances practical design, smooth performance, and tactile satisfaction.