Body Sport Adjustable Dumbbells deliver a full 3-to-40-pound range in one compact set, with a secure plate-locking system that keeps every weight increment firmly in place for safe, confident lifts. The reinforced selector dial withstands daily repeated use, and the flush-seating plate design eliminates wobble and rattle even at the maximum 40-pound setting. Twelve weight settings let you progress from light toning to heavy strength work without buying multiple sets. Select your desired weight with the dial, confirm the plates are locked, and begin your set of curls, presses, rows, or lunges. Return the handles to the tray to release and store plates safely between sets.