This 24 Colors Double Line Outline Pens Set redefines creative expression with its unique dual-line design and luminous shimmer finish, making it an essential tool for drawing, greeting card making, Diy art crafts, and scrapbooking. Crafted with high-quality, fade-resistant ink infused with fine shimmer particles and innovative dual-tip technology, each pen creates two parallel lines in one stroke-eliminating the need for tedious manual outlining and adding instant depth, dimension, and a sparkling touch to every project.