Dumbbell Adjustable Ankle Straps Design: The adjustable ankle straps are patented. This ratcheting based weightlifting shoe fastening design. Weightlifting feet are uniquely designed to hold a standard dumbbell. Monkey ankle straps hold up to 66lbs of weight. This leg curl machine innovation allows athletes to lift dumbbells with their feet, using this weightlifting accessory More Ankle Strap Foot ExerciseLike adjustable ankle straps instead of your hands, opening dozens of leg training movements and using adjustable ankle straps for leg extensions, high knees, kick curls hamstring, raises, donkey kicks, hip flex strength/power training, etc. You only need the weight leg curl machine without the need for expensive machines. Fits 99% of feet and dumbbell sizeThe new adjustable ankle straps are pretty cool for lifting weights use a pair of alloy buttons to adjust the T and size of the dumbbells to fit you better . No matter what the overall size of the cable ankle strap is it is not limited to people with smaller shoes/feet. Even if you wear bigger shoes or have big feet, these leg curl machines work well Lifesaver Adjustable ankle straps are the ultimate home gym glute builder. These ankle straps are portable, getting a killer lower body workout with weightlifting anywhere, anytime. In terms of increased stamina and balance, Monkey Ankle Bands for Training increase muscle activation. EASY TO INSTALL - The cable ankle strap has quick release system feet that will fit most standard dumbbells sold by the pair. Just add dumbbells Opportunity puts no limits on where you train