MFDevice

The MFDevice, I believe it stand for Multifunctional device, has two modes Wrench and ID-Tool.

The first mode allows you to recover any blocks in the mod by right-clicking on the block, the block should be inactive. It also allows you to right-click on any side of a directional projector to change the direction of the force field.

The second mode allows you to change a Blank MFFS Card in a MFFS ID Card, however I do not know of any uses for this ID card.