Description Proprietary compact design replaces 30 pairs of dumbbells The PowerBlock Pro 100 EXP adjustable dumbbell set starts with stage 1 at 40 pounds with the option to add 3 additional expansion kits to get to 60, 80, or 100 pounds. Scale up or down as needed to customize your workouts. This pair of 100 pound adjustable dumbbells utilizes the same design trusted by professional and collegiate leagues, armed forces, elite training facilities, and premier gyms worldwide. The PowerBlock Pro 100 EXP can be converted into an adjustable kettlebell using the Pro 100 Series Kettlebell Handle. Coming soon, the EZ Curl Bar and Straight Bar attachments will be available for even more versatility. Sold in pairsStage 1: 5-40 poundsWith Stage 2: 5-60 poundsWith Stage 3: 5-80 poundsWith Stage 4: 5-100 poundsCompact size: 19.2” L x 7.6” W x 7.7” HAdjustable in 2.5-lb. or 5-lb. increments