Heavy Machinery Design Deft Converting tools excavator by Zhao Yan In the actual project work, different working environments demand different tools to deal with. However, machines in current market can not meet the above requirements. This excavator can change tools itself automatically and conveniently, it can do the works like excavation, chisel, drilling, crawling in mud. This flexible, compact, versatile excavator is more suitable for urban construction and maintenance of local area. Innovative in structure of the excavator made construction easier than before.