The Muscle Gadgets Band Strap Set of 2 in gray color is designed for weight lifting activities, providing anchor resistance for workouts. This set includes two bands with adjustable straps to securely attach them to dumbbells, allowing for a variety of strength training exercises without the need for anchor points. The band straps offer a convenient and versatile option for adding resistance to your weightlifting routine, enhancing your fitness and strength training sessions.see pictures I have never used anything like this