The Seated Leg Curling is aimed to the isolation of the hamstrings muscles in a sitting position. It stands for:

gas assisted backrest adjustable in height
physiological load curve with levers system;
adjustable thrust rollers;
upper roller to place the tighs in the physiological correct position and adjustable in height;
counterweights to reset the empty weight of the exercise levers;
adjustable starting angle;
handle for easy starting system.

Optional:
2 additional weight holders.