The Best Fitness BFAB10 Ab Board is designed to tighten up your midsection; strengthen your back and improve your core stability. If you want to look and feel your best; start at your core! Comfortable and effective; Body Solid's BF AB10's three starting incline positions (15; 20 or 25 degrees) enable you to take your workout and turn it up a degree. Best of all; the BFAB10 is fully assembled right out of the box.