The Core Roller helps build core strength to support all of your physical activities while decreasing your risk of injury. This sturdy ab roller has an extra-wide wheel that allows you to easily perform roll-outs, rolling planks, inch worms, and side-to-side roll work to target your abdominal muscles. Textured, molded, plastic wheel – 7 inches in diameter, 2-1/8 inches wide. Non-slip handles – 4-1/4 inches in length. 1 lb.