BH L020 Leg Extension/ Leg Curl Adjustable upper roller with 7 different positions and lower roller 12different positions, that provide maximum adaptability to the shape, height & constitution of the user. This enables full adjustment. Adjustable training arm with 8 different positions. Enables you to select different starting positions, to choose between leg extensions (positions 1 to 4) or leg curls (positions 5 to 8).