1.IMPROVED MODEL - WITH ADJUSTABLE SEAT - fits people small to large comfortably. 2.IMPROVE HIP FLEXORS – The Flex Bench leg stretching machine will improve leg flexibility, posture, and mobility; whether you're training in dance or aiming to enhance overall flexibility, this machine is perfect, you'll notice increased flexibility and leg muscle growth. 3.DURABLE DESIGN – The Flex Bench Leg Stretching Machine has a robust steel frame, providing durability, anti-rust, and corrosion resistance. Unlike other models we use caster wheels instead of plastic office chair wheels. 4.EASY TO ADJUST - The Gear-Driven steering wheel allows the user to crank expand or contract – up to 230 Degrees of range of motion. Sit comfortably, adjust the extension arm with the wheel, and find your optimal stretching position for a deep and effective stretch targeting your inner thighs, glutes, pelvic floor muscles, and lower back muscles.