EX-4 Excavator Droid

The EX-4 Excavator Droid was a mining droid used by the Techno Union in the Clone Wars.

Information
The EX-4 droid was originally a mining droid made for use via the Techno Union to dig for valuable treasures and gems. However, due to the Republic's bid for victory in the clone wars, they were modified into droids which could use their excavator arms to dig trenches and undermine enemy tanks. They also had a heavy repeating blaster on their back for anti-personnel functions. After the clone wars ended, EX-4 units were put on the open market, where they could be found working at various construction and mining companies.

Trivia
This droid is based on concept art by Feng Zhu for Star Ware Revenge of the Sith as seen in this video: https://www.youtube.com/watch?v=h_l4MI_AR3U