The ShengShou Mr. M is a 3x3 speed cube and the first magnetised 3x3 created by ShengShou. The ShengShou Mr M features designated slots inside the cubies for the magnets to sit. Out of the box, it is fast, light and snappy. We love this new magnetic 3x3 at the KewbzUK office. The exterior of the Mr M is much the same as the "Gem" series of puzzles.