Fat Gripz Pro - The Simple Proven Way to Get Big Biceps & Forearms Fast - At Home Or In The Gym (Winner of 3 Men’s Health Magazine Awards) (2.25” Outer Diameter)Brand: Fat Gripz Color: NEW! Blue Black Features: BUILD ARM SIZE AND STRENGTH Fat Gripz will help you build bigger, stronger arms. They work by wrapping around barbells, dumbbells, pull up bars and exercise machine handles and increasing their diameter TIME TESTED METHODS, NEW SCIENCE Science has now confirmed what athletes and bodybuilders have known for decades that using a thicker diameter bar causes much greater muscle activation in the arms which