This new marker from Graph It has a unique triangular shaped body making them more comfortable and easier to use than the more traditional round shaped barrel. They have a high quality Japanese made Chisel Nib at one end and a Fine Detail nib at the other, making them ideal for both large and more intricate studies. They will also last longer than many other brands with approximately 20% more ink. The coloured end caps with bold colour codes makes colour selection easier. Brush nibs are available separately and can be interchanged for the chisel nib easily. Graph'It are are a premium quality ink and will work perfectly together with Copic, Promarkers and most other brands of alcohol markers.