These highly popular medium-point acrylic paint markers are used for many applications all over the world. Widely used for industrial and manufacturing applications, yet also certified non-toxic (except for metallic colors) so they are safe for use by kids and in schools. Acid-free for safe use with scrapbooking and crafts. Marks well on glass, metal, greasy surfaces, boards of all types, concrete, plastic, etc. Bulk discounts available for purchases of 48 pieces or more. Made in USA.