Excavator can be compared to engineering vehicles. These are actually used for digging trenches, foundations and holes. Excavator can also be successfully utilized for several other purposes such as lifting, placing heavy materials and demolition. Brush cuttings can also be eased with the help of backhoe excavator via hydraulic attachments. Most people use the term 'excavator' for all equipments that work for the process of digging. The true excavators possess an arm, a cats and a bucket. The can is placed on pivot, a rotating platform. Usually, the pivot is found on the top of an undercarriage with wheels or tracks. The design of this pivot is inspired from steam shovels. Another term commonly used for excavators is 'diggers'.