U-33 Stage I for Females & U-70 Stage I for Males
U-33 Stage 1 for Females & U-70 Stage I for Males is Generally Fine For Beginner to Intermediate. Advanced Female will use U-70 and Advanced Male can use U-90 Stage II – 70 Set
1. U-33 Replaces 16 sets of dumbbells from 3-21 lbs. U-70 Replaces 15 pairs of dumbbells from 5-40 pounds
2. U-90-Stage II Replaces 22 pairs of dumbbells from 5-70 pounds.
3. Can adjust in increments of 2.5 pounds.
Bottom Line: The Best Dumbbells on the Planet, Period!