CAP Barbell 25 lb Adjustabell dumbbell features the adjustable weight adjustment system that is safe, quick, and easy to use. The adjustable weight-adjustment system allows you to rapidly switch from one exercise to the next. Simply turn the handle right or left to adjust the weight in 5-pound increments, pull up, and start your workout. The straight bar handle has a natural orientation for a comfortable, secure lifting position. U.S. Patent 11,285,354