When used as a crusher, this machine can force a 55gallon drum down to 6" high in under one minute. To compact waste within a 55gallon drum, remove the drumcrushing plate and it will reduce the drum's contents to 20% of their original height. This crusher/compactor has an oil reservoir for ISO32 hydraulic oil. This unit has a keyed on/off switch and watertight, double locking handle.