The polarized redstone block, as the name implies, is an orientable block that simply counts as a solid block on two opposite sides, and as a transparent block on the other 4. Thus is conducts redstone current in only the direction the block is oriented. Such a block could be used to simplify/compact redstone circuitry. Along the horizontal plane a repeater serves the same function but adds a delay to the current. This block would not, and would be useful in compacting vertical redstone circuits.