The flat on the top increases the ability to get your fingers over the top of the ball for maximum hand grip engagement. The new FitBar Pull Up Ball Grips are manufactured from a high-performance thermoplastic material that have a molded-in surface texture which provides good grip characteristics with outstanding durability. The grip surface includes a mesh pattern on the ball radius, a radial pattern at the ends of the ball, and an annular pattern at the center. Pull Up Bar Attachments FitBar Ball Grips | Cannonball Grips | Pull Up Bar Grips Fat Grips The Rotating Cannonball Grip provides an exceptional challenge to ninja warriors, OCR athletes, or rock climbers, and fitness enthusiasts who are looking for extra forearm and obstacle grip training The FitBar Pull Up Ball Grip hooks fits any 1 1/2” or smaller diameter bar. Molded-in surface texture provides optimum grip with outstanding durability Finger Strengthener Buy FitBar Ball Grips | Cannonball Grips Gym Home Workout Wrist Muscle Forearm Hand Grip V handle Dumbbell Bar... These are recommended for any fitness or obstacle application where you are using a Pull Up Ball Grip in each hand. Great for lifting weights like farmer’s carries and for use with cable machines