Sofft Tools feature non-abrasive micro-pore sponge surfaces, designed for artists and crafters to hold and release the right amount of color for smooth results. Developed for use with PanPastel Colors, these tools can also be used with most water-based art and craft materials for a variety of unique marks and effects. They are reusable and come in different forms and shapes to fit artistsÃ† needs. The different shapes allow for precise marks, blending, layering and more. This set includes four knives in a variety of shapes with 16 covers, 12 mini applicators, a flat angle slice, a round angle slice, a big oval sponge, four sponge bars and an applicator with four replaceable heads.