Material: SiliconeSize: 10CM*5CM (inner diameter 24mm is suitable for 25mm 28mm 30mm diameter handle bar)EASY TO USE: 1-Expand Grips, 2-Attach to Bar, Quickly convert any barbell, weight bar, pull-down cable, and kettlebell to a thicker 2-inch grip for better training.Easy to install and remove in seconds. Use them on all your gym equipment to add versatility to your entire gym!What it does: Thicker handles enhance your muscle stimulation, which translates to greater muscle mass and strength in your forearms, hands, and entire upper body.Builds grip strength and works the forearms, upper arms and entire upper body. Reduces Stress on Joints, Elbows, Wrists Reduces stress on joints by distributing weight over a larger surface area and muscles, reducing joint pain and reducing stress on wrists, hands and fingers.MULTI-PURPOSE: Convert any regular dumbbell, barbell, pull-up bar, push-up bar, rope attachment, or any other bar into a heavy bar workout.