Sakura 50010 9-Piece Zentangle Clamshell Pencil Set Zentangle clamshell pencil set is an easy to learn way to create beautiful images from repetitive patterns Provides artistic satisfaction and an increased sense of well-being Includes arts and crafts, education and corporate settings, ultimate in quality and design Promote cross-cultural understanding by analyzing and comparing patterns used in indian henna, celtic knotting, zuni pottery and maori tattoos Consists of 1 micron pen each of 01, 03 and 05 and 1 pencil with 5 each official atc tiles measures 2-1/2-inch length by 3-1/2-inch width