● Switzerland imported refill: smooth writing and smear-proof, retractable and refillable ● 0.5mm fine point draws razor-sharp, consistent lines● Handy retractable and rotatable design, convenient to use● All-metal precision connection parts, 50,000 times rotation life test

● Writing thickness: 0.5mm ● 0.5mm high-precision tungsten carbide ball ● Smooth writing experience ● Reliable and durable ● 3PCS per pack