The china grease pencils are made of quality paper and wax material safe and reliable not easy to tear or break smooth writing hard to fade providing you with a service for a long time. Application Our china marker for designed to work on a variety of surfaces as well as porous and non-porous materials. safely use the markers on glass ceramics plastic wood fabric metal stone leather or vinyl painting drawing construction and more. Instruction Non-Sharpening tip Unlike similar products on the market our wood pencils safely you the hassle of constantly having to sharpen! Simply peel down the paper wrapping using the built-in string to reveal more tip. Note Store crayons in a dry cool place after use away from direct sunlight or excessive heat to keep them in optimal condition away from flammable items as crayons may contain flammable ingredients.