2 wraps with Regular Duty: 160 lbs
3 wraps with Regular Duty: 335 lbs
4 wraps with Regular Duty: 580 lbs
2 wraps with Heavy Duty: 275 lbs
3 wraps with Heavy Duty: 560 lbs
4 wraps with Heavy Duty: 725 lbs
Regular duty has a thickness of 2mm and the heavy duty has a thickness of 3mm.
People tend to choose the heavy duty in slightly rougher/more demanding conditions.
Both work great for most jobs.