Derwent is top of line and these watercoloured pencils are no exception. These watercolour are the best because they're like paint brushes but you get a smoother more efficient stroke out of them and when sharpened you get the stroke you can't get with an ordinary brush. There are 24 different colours so theres all the colours well all the main colours needed. These pencils last a very long time and even with a A3 piece of paper I still didn't need to use a sharpener once. My sisters sons are always using these pencils and have been for a very long time almost over a year and they still work today. These pencils are truly amazing. Derwent will always provide the best quality and will never let anyone down and I can honestly agree with that statement.