Electro-Hydraulic Thruster Operated Drum Brakes is equipped with a torque spring that is protected from the environment in an enclosed steel tube, which is fitted with a torque indicator. These Drum Brakes can also be fitted with a manual release lever. These Drum Brakes are also available with flameproof thrusters that facilitate ease of operation. Electro-Hydraulic Thrusters Operated Drum Brakes are designed for heavy duty cranes, conveyors and process lines.