StretchMax is a portable and light weight stretching system designed for Dancers and Gymnasts to improve their leg flexibility and range of motion. Features superior design with a soft & very secure door attachment, eliminating damage to your door from metal parts. Uses a large welded chrome D-Ring for a smooth sliding motion. One may safely stretch their Hamstrings, Calves, Quadriceps and Hip Flexors. At about 5 ounces or 150 grams, it's so small and light weight it can easily fit in the pocket of a dance bag or gym bag and go anywhere with you. Free Instructional videos and a free instructional app for your mobile device is available.