Adjustable Stools are of numerous kinds and make.
You have to decide on what type of particular adjustable stool will be suiting your needs very precisely.
This is because; they come in different styles which do have different modes of fixing or assembling them as a whole stool.
You could fit them according to the required specific heights.
The purpose for which you are going to use the particular stool and for how long determines the type you are intending to purchase.
Normally there are stools which could be adjusted to various heights by means of a hand lever provided in the middle of the stool.
You could ease of the lever to fit the stool to the required height.
This is used in the mechanical garages wherein the servicing mechanic would have to sit and attend the automobile at various heights for performing various operations.
Another type of stool is the one which too has the top circular portion separate and the four legs separate.
You could fit in the top rest to the legs in four different stubs provided in the legs rest.
Each stub varies by a distance of 10 centimeters precisely.
So you could sit in four different heights.
Again from the cost aspect of the adjustable stools and combined durability, you will have to look in the product personally which is a lot better.
You can sit and see how much weight it can withstand practically.
Sometimes you might use it for the purpose of standing on it and to fix a ceiling fan in the top.
In that case the adjustable tool should withstand your full weight and remain in the same height without loosening the height lever.
Dental practitioners use a cushion type of adjustable stools in which the hand lever at the back aids them easily to rise or lower the seat in a vertical steel axis.
The prices of these kinds of adjustable stools are a bit costlier.
Still you can get some better priced adjustable stools also.
These are made out of materials like cobalt and the aluminum.