"Flip" the direction of matierals on parts. When using a material with an obvious direction such as Wood Planks it can be annoying when the "direction" of the material ends up wrong on your parts.... Now you don't have to worry about that anymore, just put the parts down however you want, and this by clicking on them with this plugin selected you can "flip" the direction that the material pattern faces on those parts. Also keeps the SurfaceTypes of the part "in tact", so that each surface-type will still physically be in the same place that it was before the flip.