- Creative DIY Fun: Adds sparkle and elegance to projects, great for personalized cards, art or decorative designs for kids and adults. - Double Line Markers with unique technology: Increase your creative projects with shimmering double line markers. With unique technology, these pens automatically create stunning contours and give your artwork a beautiful two-tone effect. - High quality and smooth ink: The double line pen is made with high-quality ink, which is smooth and liquid to ensure that they flow easily on paper and do not skip or clump. Make sure your writing stays in place and won't smudge or fade. - Easy to Use: Shake it to ensure the ink is completely mixed. Then take off the cap and press the tip onto your surface. Repeat this a few times in a pump process to activate the ink until it starts to flow and circulate. - Use scenarios: Personalised cards, invitations and gift tags for weddings, birthdays, and holidays. Scrapbooks, planners, and decorative journals for elegant accents. Art projects, drawings, and kids crafts to create two-tone contour effects and decorative designs.