Lazy to go for gym? Want to train in your house? Grab this AB Roller in your house now! The AB Roller now comes with a Free Knee Mat. It helps you to reduce the pain and injury to your knee while you doing your fitness. Fitness is very important to train your muscle and abs. For carving your core and strengthening arms, shoulders and back in one motion. The AB Roller wheel elongates your spine to work muscles on both sides of your body at the same level, and GENERATES MORE MUSCLE ACTIVITY THAN NORMAL CRUNCHES. Can also lower the risk of a back injury. The AB Roller designed with double wheel. Double wheel helps to increase stability and ensures an efficient workout no matter what surface equipment is used on. Features traction tread to prevent sliding, comfortable grip handles and strong stainless steel tube that can withstand your whole body weight. It is easy to assemble. It is very simple to assemble and disassemble from anywhere. Portable, lightweight and great for travel.