- Ergonomic Optimized Leg Extension Machine: Combines user-friendly ergonomic design and advanced biomechanical engineering to optimize calf workouts and help build stronger, more powerful calves.- Saver, More Focused Workout: Unique foot platform design eliminates stress compression on the ball of the foot while providing optimal range of motion for deep muscle fiber penetration.- Adjustable Settings: Adjustable thigh pads help to fit your body size, while the padded seat adds comfort and ergonomic well being to your workout on this weight bench with leg extension.- Durable and Sturdy: The preacher curl bench machine's sturdy, durable frame is made from powder-coated steel and is built to hold up to 440lbs.