These easy-to-use, water-based markers are an innovative alternative to traditional chalk. They have hi-opaque, pigmented inks that are, lightfast, odorless and xylene free. Use them on any non-porous surface like chalkboards, windows, mirrors, dry erase boards, light boards, windshields and ceramics or as permanent color on wood and other porous surfaces. They draw and write very smoothly, dry quickly and they wipe off in cinch. Simple to use for writing messages to your friends and family, advertise specials, market new products or events at restaurants, retail and coffee shops. Each markers comes with a reversible tip that allows you to select either chisel or bullet tip points. Each tip is 6mm wide to allow you to get the best details, yet make it broad enough to see from afar! This set also comes with 8 bonus chalk labels as well as 2 replacement tip refills!