This MoYu MeiLong 3x3x3 Stickerless Speed Cube is designed for maximum smoothness and durability. The individual cubes have a concave inner design that reduces the contact between the cubes. The feet holding the cubes into the center base are made to prevent any popping or loosening of pieces. Screws within each cube face can be loosened or tighten to control tension. A must-have for any beginning speedcuber!