The HLT5000WP High Torque Digital Servo -

Designed and Manufactured in Australia.

Unbreakable fully billet casing, waterproof*, 15T gear teeth, heavy duty metal gears, high quality coreless motor, smart digital signal controller with Led status signals for diagnostic, quick disconnect servo lead, current limiter and over temperature shut down if servo ever got stuck to prevent the controller board from being burnt out, automatic shutdown if no RX signals present.
 
 
https://www.youtube.com/watch?v=tdEs-R6JgLo