LifeLine Hex Rubber Dumbbell Set, 150lbs, 200 lbs, 380lbs & 550lbsProtect the floors in your gym or home with these durable rubber covered dumbbells designed for weight training, cross training workouts, HIIT, and general fitness. Dumbbells are great for evening out strength imbalances, improving coordination, and activating more muscle fibers in comparison to bars, and these have ergonomic handles that are slightly thicker in the center to prevent hand fatigue. The hex design not only comes in handy for plank push