JustArt acrylic paint markers feature a flexible brush tip and broad tip. The brush tip is ideal for handling intricate details, outlining contours, and drawing lines, while the broad tip allows you to fill large areas, unleashing your creativity quickly. Note: Please tighten the cap and keep acrylic paint pens horizontal when you're not using them. These paint markers feature automatic ink control, which balances the pressure inside and outside the pen to allow ink to flow naturally—no need to press the tip to release ink. The ink flows smoothly while writing, preventing spills or clogs, and maintaining the refined, professional look of your artwork. The premium acrylic Ink in these acrylic markers works exceptionally well on rock painting, stone, wood, fabric, glass, plastic, metal, ceramics, banners, card making, greeting cards, and DIY art projects. Their wide range of applications opens up more creative possibilities for your art projects, allowing you to unleash your artistic imagination. These acrylic pens are non-toxic and waterproof. Once dry, the vibrant colors are water-resistant and fade-resistant, making them ideal for art projects. It's the perfect choice for beginners, students, hobbyists, and artists alike.