Iron Bull Strength Alpha Grips 3.0 - Extreme Arm Blaster - Best Dumbbell and Barbell Thick Bar Adapter Turn any regular dumbbell, barbell, pull up bar, cable attachment into thick bar training. Increase finger, wrist, hand, forearm and grip strength while doing your regular workout. Unique Ergonomic Design offering Arch Support. Recommended to everyone who wants to increase performance. Installs on every gym equipment in less than 10 seconds and is fully portable.