Designed for commercial and industrial applications Easy to install inspect and maintain Totally enclosed steel plate construction with a durable powder coat finish Gear train features lifetime lubrication no oil changes required Heavy duty ventilated motor with thermal overload protection All models come equipped with a chain container Reliable DC electro-magnetic brake holds the load even if power is interrupted Quick connect wiring for power and push button controls durable 24V push button control station comes with cable strain relief Upper and lower limit switches prevent over travel Proof tested with test certificate Solid state starting switch for added reliability All models equipped with slip clutch design overload protection Hardened 80 grade chain