Hollow hydraulic wrench 1: hollow hydraulic wrench body uses high-tech aerospace materials (aluminum alloy) and ultra-high-strength alloy steel, one piece, the body has a light weight, high strength, toughness and good. 2: hollow hydraulic wrench maximum working pressure 70Mpa, an accuracy of ± 3%. 3: hollow hydraulic wrench 360 ° × 180 ° rotating hose connector, without the use of space restrictions, easy to operate 4. Hydraulic Wrench hollow light, thin, short, large torque, a single working head can work with multiple heads use . 5. hollow hydraulic wrench specification is complete, the specifications can be used in conjunction with the transition sets on the market for most of the bolt specifications, special models can be customized