Callicreative Duotips are calligraphy markers with a difference - each pen is capable of producing both thick and thin lines, as each has a fineliner at one end and a chisel-tip at the other. Suitable just for everyday writing or colouring, or for creating a wide range of lettering effects, from intricate, detailed penmanship, to bold, flamboyant calligraphy, Duotips are an economical way of keeping different tip sizes and colours to hand.