Little Treasures Cube Speed 2 x 2 x 2 Stickerless Magic Cube Puzzle, Bright Vivid Colors Adjustable corner cutting tension (tighten or loosen the center screw to adjust the tension) Standard structure comes-lubricated by the manufacturer, but the tightness is adjustable If the cube doesn't fit your style, just adjust the center screws Improves fine motor skills and dexterity while keeping them engaged for hours 2 x 2 rotating speed cube is designed for starters and professionals, 6 sided magic cube is designed with 6 different bright colors