[Product Information]

• Fat Gripz are the new worldwide training phenomenon which helps add muscle and strength to your upper body (especially your biceps and forearms)
• Fat Gripz work by instantly converting barbells， dumbbells and pull-up bars into thick bars so that you can train the way many Pro athletes do. Using a thicker diameter bar causes much greater muscle Activation throughout the arms
• Made from a high-density material a lot like extra tough rubber - they are built to last a Lifetime and won't compress even if lifting extreme loads