Ideal For A Wide Range Of Fitness Workouts - Wherever You Are! Aids In Burning Calories By Raising Heart Rate Helps To Tighten, Strengthen And Relax Muscles Of The Hands Improves Muscle Strength And Endurance High Quality Solid Cast Dumbells Encased In Durable Rubber. Ergonomically Designed Easy Grip Handle Provides Optimal Grip During Your Workout. Helps Build Core Strength And Stability And Works All The Major Muscle Groups.