Force USA Adjustable Ab Bench helps you build big core strength... with a massive 14 different crunch positions! A ripped physique starts with the core. The Force USA Adjustable Ab Bench gives you terrific core strength, ripped abs and powerful back muscles. Work your upper and middle abs in 14 crunch positions. Just use the pin and quickly and easily adjusts the angle of the bench to increase or decrease your workout intensity. Target your lower back muscles with standing hyper-extension exercises.