Use these Real Slate Chalk Color Pencils with our natural chalkboards for smooth writing and drawing. Our chalk pencils offer superior writing and drawing control. They are made of solid wood and contain the smoothest chalk instead of graphite. These pencils are safe to use on all of our natural slate products. Colors included in this assortment are Red, Orange, Green and Blue. We recommend using with our 100% Wool Chalk Eraser for clean-up.