Muscle-Up Masters Calisthenics Forearm and Grip Trainer - Bar Thickener for Pull-up bars Barbells Dumbbells Kettlebells - 1 Pair Thick, high-density silicone rubber increases the diameter of nearly any barbell, dumbbell or pullup bar by 1 inch to intensify your forearm workouts and promote muscle stimulation for faster growth Ergonomic and cross pattern design to provide a better grip and more comfort throughout your workout Attaches to nearly any barbell, dumbell, kettle bell or pull-up bar in seconds creating the ultimate barbell grip, dumbell grip, kettle bell grip or pull-up bar grip ever Made to create the best forearm and grip workout ever 100% Satisfaction Guarantee