All Cormach cranes include a column with a twin mast, large dimension slew bearing with external rotation motor, and gearbox. Cormach’s unique design eliminates harmful stress on the boom. The powerful Cormach structure with slew bearing and column is often used by companies needing a large knuckle boom crane; only Cormach uses this heavy duty structure throughout its entire line. This construction provides many advantages when compared with competitors' cranes.