Sanford Products - Sanford - Design Kneaded Rubber Art Eraser, Medium - Sold As 1 Each - Kneaded rubber molds into any shape. - Perfect for pencil, charcoal and chalk. - Also for shading and blending. - Leaves surfaces smooth and bright. - Kneaded rubber molds into any shape. Perfect for pencil, charcoal and chalk. Also for shading and blending. Leaves surfaces smooth and bright.