For areas with corrosive environments or high humidity choose a JET Air Hoist. Multi-vane motor with 100% duty-cycle will never overheat. Easy-to-adjust speed control offers accurate load spotting. Other air hoist features include: tail mounted automatic brake, upper and lower limit stops, drop forged safety hooks, pull cord control, and heavy-duty chain bucket. Variable speeds depending on psi supplied. Air inlet is 1/2" NPT. Pull cord control is standard on all units, 4' less than lift.