Screw jacks are used alone or in multiple screw jack lift system arrangements that require flexible jaw couplings to transmit power to the input shaft. We provides flexible jaw couplings for use with screw jacks. Require no lubrication, and are resistant to oil, grease, moisture and other contaminants. Small volume and large transmitted torque. To be plugged in axially, easy assembly, maintenance-free. Balancing axial, radial and angular misalignment. Torque ratings from 17Nm to 3600Nm. Service temperature from -40°C to +90°C.