chartpak grumbacher palette knife set. grumbacher palette knives are made of hard wearing abs plastic that won t corrode or rust. each tool is lightweight and easy to handle solvent safe and easy to clean and has a large easy to hold handle. use these knives for mixing impasto techniques and multi media needs. this package contains six tools trowel large painting knife small painting knife painting spatula large palette knife small palette knife. each tool measures approximately 10 inches long. imported.