Features and Benefits:28” throatcan handle larger panels than the MH-19 can.Stretches, shrinks, and planishes up to16 gaugemild steel.Variable speed from0 to 1,000 beatsper minute.Runs on120 psicompressed air.Regulator on the side lets you control the airflow.Air-powered system ismuch quieterthan a mechanical machine.Foot pedal operationkeeps your hands free to move the material.Quick-release handleon the front allows you lift the tool up and take the material out.Shrink and stretch with air! The compact,USA-madePH-28Ahits much harderthan traditional pneumatic power hammers. You can even use athumbnail shrinker die(included).