Chameleon Pens are much more than a normal marker - they give you the power to change color and simplicity to your art. Each pen goes from as light as a hint of a tint to rich tones, eliminating tonal gaps in your collection. One pen, multiple color tones! For simple, seamless, color gradations. Create depth, dimension, highlights, shading, and shadows…all with one pen! Built to last, Chameleon Pens have nearly twice as much ink as a regular marker pen. Can also be used like a traditional marker. Professional quality, with alcohol-based ink. Refillable, and have replaceable Japanese Nibs. Permanent on most surfaces (including: fabrics, glass, plastic, and wood). Compatible with all other alcohol-based pens and inks. Perfect for curious kids, aspiring amateurs, keen colorists, creative crafters, ambitious students, accomplished artists, and design professionals.