Holbein Oil Pastels are sticks of color made by mixing pigment (the powder that gives color) with wax and oil and pressing it into shape. They are made to feel soft when drawing. They go directly onto paper without brushes or a palette.
The range has 100 colors. Sets come in 15, 25 and 40 sticks, plus a wooden box with all 100 colors. Each color is also sold on its own.
They can also be dissolved with turpentine or other thinners for oil paint, which allows an oil-painting style of work.