Construction droids
huge, 40-story tall machines that are capable of gathering raw materials, synthesizing them into parts, and then building structures. They were built early in Emperor Palpatine's reign, and are still in use by the New Republic. They are often equipped with implosion wrecking balls, plasma cutters, and huge shovels and hammers. Each of these droids is programmed to operate along a specific path, reducing everything it encountered to rubble. This rubble is further smelted and reduced to its component elements within nuclear furnaces. These raw materials are sent on to processing plants within the droid, which modify the materials and create brand new construction materials. These can be assembled in the wake of the droid's path into new buildings based on preprogrammed designs.