Flashlight dual screw hoist, lifting by crane points into a single point and the twin-lift two series, by driving into the hand, flashlight dual two ways. If the closing force is 50 tons, 60 tons of screw hoist only for electric use, when available, the two sets of random hand only for installation, use no-load adjustment hand, when the load is not recommended to use hand . This product is the first choice of channels and small reservoirs, safe and easy to use. Flashlight dual screw hoist has a beautiful appearance, compact structure, easy installation, safe operation, hoist flexible, reliable, high efficiency, long life, and low maintenance costs. Flashlight dual screw hoist (1) for use in irrigation, hydropower, municipal construction, aquaculture and irrigation and water conservancy construction projects; (2) self-locking capability, allows the shutter to stay in any position; (3) with manual and electric two functions; (4) according to user requirements, can be equipped with electronic altimeter, field and remote or centralized control, conventional product with mechanical altimeter