DETAILS & CONSTRUCTION: Download the iFit app and start your free trial to discover an expansive library of on-demand video workouts led by elite iFit Trainers. Learn how to make the most out of your home exercise routine by following along with your choice of instructional strength, endurance, and recovery videos Each Rapid Strike dumbbell features 5 weight selections, so you can move in 10-pound increments from 10 to 50 pounds. Replace an entire rack of dumbbells with these compact adjustable weights Adjust your dumbbells in 10-pound increments to dial in the best weight for a variety of strength-building exercises in the comfort of your own home gym - simply lift and push the Rapid Strike selector to easily modify your dumbbell When not in use, your ProForm Rapid Strike adjustable dumbbells can be securely stored in custom-molded trays that are clearly marked with weight identification