Welcome to Joye Machinery Technology (Shanghai) Co. Ltd, your trusted partner for high-quality industrial assembling and maintenance tools under the renowned DUPLEX brand. Specializing in hydraulic tools since our inception, we offer a comprehensive range of products including hydraulic wrenches, cylinders, hand pumps, pullers, bolt stretchers, nut splitters, and flange spreaders. In addition to our hydraulic tools, we have expanded our offerings to include advanced torque solutions such as elec