1Wooden Balls: Very comfortable wooden balls. They build muscle strength in the fingers, wrists, forearms, arms, shoulders and abdomen. 2Fitness Accessory: They can be used as a home gym accessory, or you can keep them in your suitcase to work out while you travel or play. 3Durable and Safe: The ball is made of composite material, the hook and loop is made of 304 stainless steel, the webbing is made of nylon, and the ball has many spherical grooves so your hand won't slip off easily. 4Exercise Horizontal Support: With the pull up assist handle, you can turn the regular pull up bar into a neutral grip pull up bar. It can work on your horizontal support ability. 5Perfect Gift: This pull up ball is great for home workout use, practical and useful, great gift for your family and kids to work out at home.