The JET 1 Ton 20 ft. Lift Electric Chain Hoist 115V/230V combines safety and durability to operate in commercial and industrial applications. All models incorporate a slip clutch overload protection mechanism that prevents the hoist from lifting damaging loads above its rated capacity. They are available in single or three phase configurations to suit your electrical needs. Single phase models have a thermal overload protection design that keeps the hoist from overheating, while the three phase models feature a reverse phase relay that protects the hoist from incorrect wiring. The industry proven DC electro-magnetic brake increases safety by holding the load even when power is interrupted. The maintenance-free gear train incorporates a sealed oil bath, for reliability and durability. The JET SSC series electric hoist is available in 1/2 ton to 5 ton capacities with standard lifts of 10, 15, and 20 feet (custom lifts available).