The Trion Triangular Ball Pen set includes 15 pens in a mix of 10 and 5 vibrant colors, each featuring a smooth 1.0 mm tip for precise and consistent writing. Designed with an ergonomic triangular barrel, these pens reduce hand fatigue and improve grip, making them ideal for extended writing sessions. Perfect for professionals, students, and artists, this set offers versatility and comfort, ensuring clear, bold lines on any paper type. Elevate your writing experience with this thoughtfully crafted pen collection that combines functionality with style.