Derwent Studio coloured Pencils are for the professional artist. They have the same texture and blendability of Artists coloured pencils, with a crisper, more precise drawing style. The Studio pencil shares the same colour core as Artists, but it is slimmer and the wood barrel is hexagonal rather than round, so it's easy to grip and particularly suited to detailed illustration work, such as botanical studies, architectural drawing and graphic design. Finished in black with a colour-coded end for easy identification. 3.4mm core. Pencils are packaged in a handy hinge-lid tin 12-colour set includes a rich colour palette of Deep Cadmium, Orange Chrome, Deep Vermilion, Crimson Lake, Imperial Purple, Spectrum Blue, Prussian Blue, Mineral Green, Grass Green, Golden Brown, Copper Beech, and Ivory Black.