GRZ-6B
this was the designation of Serv-O-Droid's wrecking droid, produced more than thirty years before the Battle of Yavin. Standing more than six meters in height, the GRZ-6B looked like a huge monster as it moved across an urban landscape, knocking down buildings and recycling the materials. The GRZ-6B moved about on two heavy legs, and two massive arms allowed it to pull down structures and move rubble into its "mouth." The body of the GRZ-6B was dedicated to a huge internal forge which melted down anything which was placed inside. The GRZ-6B developed an high internal temperature as it worked, and had to be shut down in order to completely cool, so that the materials it melted down could be recovered.