Bennett actuators are strong but flexible nylon/fiberglass hydraulic cylinders. The piston-like arms push tabs into position. Fluid flows through a concealed hole in the upper hinge at the top of the actuator - thus eliminating external hoses subject to damage.
A1101A is the standard
A1101EX is an external line connection used in cases of total inaccessibility inside the transom
A1200S designed for installations where space is limited