Catalyst Contour No. 63 is a versatile mint colored nylon tool featuring an edge with three square notches. Originally designed to be used with heavy-body paints, Catalyst Contours also excel with encaustic, ceramics, plaster, clay, cake decoration and more. Their ergonomic shape allows for comfort in your hand and a controlled interaction with your work. Easy to clean each tool is heat-resistant, solvent-resistant, dishwasher safe and approved food safe by the FDA.