Specifically designed to operate subsea, the Autolock hydraulic vise-grip can be activated by hydraulic downline with Hot Stab connection plugged by ROV to the HPU located on board.
The Autolock  is a positive hydraulic locking device.
The piston is locked into the sleeve (like a press fit joint); and unlocked by putting pressure in the unlock port  to allow the piston-rod movement.
- Vise-grip opening by putting pressure in the pulling chamber ,
- Clamping force done by putting pressure in the pushing chamber  and clamping locked by releasing pressure by the unlock port .