Matter Manipulator X
Matter Manipulator X is an object unobtainable by players through normal means. This item's information is present in the game files, but not intended by developers to be in players' possession.
The Matter Manipulator X is a mining tool which is equivalent in almost every way to a fully-upgraded Matter Manipulator, dealing 4.8 block damage per 0.25 seconds to blocks in a 5x5 square and being able to collect liquids. The only notable differences are aesthetic - the Matter Manipulator X uses pickaxe mining sounds rather than the sounds of the Matter Manipulator, and the beam that appears while mining has a different appearance.
This item can only be obtained by using /spawnitem beamaxeX while admin mode is active.