Answer: 
One group of people Walkstool was originally designed for was the electricians, service technicians and skilled workers. These workers needed a light, compact and heavy-duty stool they could carry in their tool bag and use on the job site on a daily basis. The other reason Walkstool's high maximum weight capacities are so important is to insure that the owner of a Walkstool can feel confident using their Walkstool. Most folding stools have a maximum weight capacity of 100kg / 200-225 lbs. If these lower capacity stools are tested they are tested inside a building, on a flat, hard, level surface. If these stools are put into reality such as use on an uneven or soft surface the stools break. The primary reason for the low capacity stools failing is whenever any three-legged stool is used on an uneven or soft surface two of the legs are taking on more of the user's weight, because the weight is not being distributed evenly. The stool then fails, due to the stool is not built strong enough to take an uneven distribution of weight.