The Mechanical Arm is a block used to transfer items. With the Mechanical Arm in hand, right clicking valid inventories in a 5 block radius will select them to be taken from, or deposited to if the inventory cannot be taken from. The arm will remember the order the blocks were chosen in. From there, further right clicking will toggle between taking from and depositing to. Left clicking will deselect the block. The Mechanical Arm can then be placed by right clicking on a block, and powered. The r